Reaction In Acid Medium Research Articles

Enhancing oxygen reduction reaction in acidic medium: A novel electrocatalyst of Pt–Co embedded in nitrogen-rich carbon nanosheets derived from polypyrrole-g-C3N4

Enhancing oxygen reduction reaction in acidic medium: A novel electrocatalyst of Pt–Co embedded in nitrogen-rich carbon nanosheets derived from polypyrrole-g-C3N4

Single atom catalysts for oxygen evolution reaction in acidic media

Single atom catalysts for oxygen evolution reaction in acidic media

Comprehensive theoretical study of the effects of facet, oxygen vacancies, and surface strain on iron and cobalt impurities in different surfaces of anatase TiO2.

We report the results of systematic ab initio modelling of various configurations of iron and cobalt impurities embedded in the (110), (101), and (100) surfaces of anatase TiO2, with and without oxygen vacancies. The simulation results demonstrate that incorporation into interstitial voids at the surface level is significantly more favourable than other configurations for both iron and cobalt. The calculations also demonstrate the crucial effect of the facet as well as the lesser effects of other factors, such as vacancies and strain on the energetics of defect incorporation, magnetic moment, bandgap, and catalytic performance. It is further shown that there is no tendency towards the segregation or clustering of impurities on the surface. The calculated free energies of the hydrogen evolution reaction in acidic media predict that iron impurities embedded in the (101) surface of anatase TiO2 can be a competitive catalyst for this reaction.

The Swiss Army Knife of Electrodes: Pillar[6]arene-Modified Electrodes for Molecular Electrocatalysis Over a Wide pH Range.

Molecularly-modified electrode materials that maintain stability over a broad pH range are rare. Typically, each electrochemical transformation necessitates a specifically tuned system to achieve strong binding and high activity of the catalyst. Here, we report the functionalisation of mesoporous indium tin oxide (mITO) electrodes with the macrocyclic host molecule pillar[6]arene (PA[6]). These electrodes are stable within the pH range of 2.4-10.8 and can be equipped with electrochemically active ruthenium complexes through host-guest interactions to perform various oxidation reactions. Benzyl alcohol oxidation serves as a model reaction in acidic media, while ammonia oxidation is conducted to assess the systems performance under basic conditions. PA[6]-modified electrodes demonstrate catalytic activity for both reactions when complexed to different guest molecules and can be reused by reabsorption of the catalyst after its degradation. Furthermore, the system can be employed to perform subsequent reactions in electrolyte with varying pH, enabling the same electrode to be utilised in multiple different electrocatalytic reactions.

The Swiss Army Knife of Electrodes: Pillar[6]arene‐Modified Electrodes for Molecular Electrocatalysis Over a Wide pH Range

AbstractMolecularly‐modified electrode materials that maintain stability over a broad pH range are rare. Typically, each electrochemical transformation necessitates a specifically tuned system to achieve strong binding and high activity of the catalyst. Here, we report the functionalisation of mesoporous indium tin oxide (mITO) electrodes with the macrocyclic host molecule pillar[6]arene (PA[6]). These electrodes are stable within the pH range of 2.4–10.8 and can be equipped with electrochemically active ruthenium complexes through host–guest interactions to perform various oxidation reactions. Benzyl alcohol oxidation serves as a model reaction in acidic media, while ammonia oxidation is conducted to assess the systems performance under basic conditions. PA[6]‐modified electrodes demonstrate catalytic activity for both reactions when complexed to different guest molecules and can be reused by reabsorption of the catalyst after its degradation. Furthermore, the system can be employed to perform subsequent reactions in electrolyte with varying pH, enabling the same electrode to be utilised in multiple different electrocatalytic reactions.

The influence of acetone and isopropanol crossover on the direct isopropanol fuel cell

Liquid organic hydrogen carriers (LOHC) offer a promising option to store and release hydrogen on demand within existing infrastructure. The direct isopropanol fuel cell (DIFC) uses the electrochemical acetone/isopropanol LOHC couple and combines the advantages of high fuel energy density at ambient conditions with CO2-free direct electricity production. Like other alcohol fuel cells, the DIFC combines two kinetically slow reactions, the isopropanol oxidation reaction (IOR) and the oxygen reduction reaction (ORR), requiring considerable overpotentials to drive the reactions. Accordingly, deconvoluting kinetic characteristics in the full cell is difficult. Therefore, this work uses the electrolytic electrochemical dehydrogenation unit (EDU), consisting of the IOR and the kinetically fast hydrogen evolution reaction in acidic media. This EDU then serves as an IOR full-cell model to get insights on the DIFC. Correspondingly, the demonstrated work is a comparison study investigating in-house fabricated catalyst-coated membrane electrode assemblies as hydrogen fuel cells, DIFC, and EDU. It investigates characteristic features of the DIFC and demonstrates how the acetone and isopropanol crossover affect the cathode of the DIFC.

Study of Kazakhstan’s Shungite as electrocatalyst substrate in hydrogen evolution reaction in acidic media

Study of Kazakhstan’s Shungite as electrocatalyst substrate in hydrogen evolution reaction in acidic media

Micelle-assisted electrodeposition of mesoporous PtCo nodular films and their electrocatalytic activity towards the hydrogen evolution reaction in acidic media

Hydrogen has received extensive attention in the energy field due to its high energy density and environmental friendliness. However, the large overpotential and slow kinetics limit the development of green water electrolysis technology. Rational design and construction of efficient and economical electrocatalysts are essential for sustainable hydrogen production. In this work, mesoporous PtCo films are successfully prepared by micelle-assisted electrodeposition using Pluronic F127 as a soft template. The optimal electrodeposition conditions of the film such as temperature and potential are determined. The composition of the films can be adjusted with the deposition potential to a Co content up to 45 at.%. The mesoporosity is clearly present at T=45 °C and E= − 0.6 V with a pore diameter of around 5–10 nm. The mechanism for the mesoporous PtCo films is proposed and the electrocatalytic activity in H2SO4 is evaluated. Mesoporous PtCo film with 45 at.% Co exhibits excellent electrocatalytic hydrogen evolution performance over commercial Pt/C, with an overpotential of − 22 mV at a current density of − 10 mA cm−2, and exhibits remarkable durability in the 24 h long-term aging stability test.

Engineering Ag3PO4/SnS2 heterojunction composite: A promising electrocatalyst for hydrogen evolution reaction in acidic medium

A Ag3PO4/SnS2 heterojunction composite electrocatalyst was fabricated using combined facile liquid exfoliation and hydrothermal technique by varying the concentration of SnS2 in Ag3PO4. Tin disulfide (SnS2) is a transition metal dichalcogenide that is a promising non-precious catalyst for hydrogen evolution reaction (HER) application. However, the practical application of this material is limited due to its poor electrical conductivity, to overcome this limitation it is made as a composite with Ag3PO4 as a n-type semiconductor which function by absorbing visible light with its suitable bandgap. The HER is evaluated through the three-electrode electrochemical set-up, where the catalyst coated on carbon cloth serves as a working electrode along with Ag/AgCl and platinum wire as reference and counter electrode respectively. The electrocatalyst is considered as best when it has certain criteria including lesser value of overpotential implying low current requirement to produce hydrogen. The catalyst should obey the following criteria like low resistance, high conductive nature, smaller exchange current density and has large surface area to actively participate in the electrochemical reaction. Apparently Ag3PO4/5 wt% of SnS2 is found to be the best performing composite as evidenced from the experimental data. This work may be useful for heterojunction composite catalyst for the practical application in electrochemical water splitting.

Robust self-supporting MoS2@Ni2B-GO/CNT electrode for enhanced hydrogen evolution reaction in acidic medium

Molybdenum sulphide (2D-MoS2) promises great potential as a hydrogen evolution (HER) catalyst, especially, when combined with conductive carbon supports like graphene oxide (GO) and carbon nanotubes (CNT). However, the hydrophobic nature of these carbon supports limits the catalytic potential of MoS2. To overcome this, we introduced hydrophilic Nickel Boride (Ni2B) into GO/CNT electrodes (Ni2B-GO/CNT), enhancing wettability (Contact angle-25.3°) and HER activity. By hydrothermally depositing MoS2 onto the hydrophilic Ni2B-GO/CNT electrode, we fabricated a self-supporting MoS2@Ni2B-GO/CNT electrode. The MoS2 deposition led to the formation of MoS2@Ni2B-GO/CNT heterostructure with multiple interfaces, favoring interfacial electronic redistribution (XPS) to significantly improve the HER activity. Thus, the proposed MoS2@Ni2B-GO/CNT electrode exhibited an excellent durability of 100 h (97%) and an overpotential of 224 mV at 10 mA cm−2 in acidic medium.

Electrodeposited manganese carbonate as an electrocatalyst for hydrogen evolution reaction in acidic medium

The electrolysis of water is the key method for hydrogen production but the high overpotential necessitates electrocatalysts. Traditionally, Pt is used, but it is scarce and costly. Herein, MnCO3 is unveiled as an electrocatalyst for the production of hydrogen. MnCO3 is electrodeposited onto pencil graphite by chronoamperometric method and confirmed by XRD and vibrational spectroscopic studies. MnCO3 electrodeposited for 15 min at 2 V demonstrates a good HER activity (overpotential of 123 mV to reach 10 mA cm−2) in 0.5 M H2SO4 with a Tafel slope of 79 mV dec−1. In addition, MnCO3 exhibited good stability during continuous operation (over 3000 cycles and 14 h). Though MnCO3 requires higher overpotential than the benchmark catalyst (Pt/C) to reach 10 mA cm−2, it outperforms Pt/C at higher current density (≥75 mA cm−2) demonstrating that MnCO3 could be used as an electrocatalyst to produce H2 at a high rate from acidic medium.

(Invited) Structural Transformations of OER Catalysts during Activation and Operation

Electrocatalysis of the oxygen evolution reaction (OER) plays a pivotal role in the hydrogen economy. Optimizing materials for this reaction presents a significant challenge, as many highly active materials exhibit low stability during activation and/or operation. Therefore, operando methods capable of probing catalyst structure and morphology become key tools for monitoring transformations during operation. These transformations not only determine activity but also influence long-term stability. In this context, high-energy X-rays provide a valuable probe, easily penetrating electrolytes and cell walls, offering unprecedented insight into material behavior. This contribution presents several classes of OER catalysts operating in alkaline and acidic environments, with their structural transformations studied using high-energy synchrotron scattering techniques.Layered double hydroxides (LDH) represent an important class of catalysts functioning in alkaline environments. Notably, NiFe and CoFe serve as exemplary materials due to their high activity and stability. However, in many cases, the structure during the OER reaction differs from the as-prepared materials, undergoing an α-phase to γ-phase transition, where the latter is the active phase. This transition, at times reversible with potential, is challenging to observe without high-energy wide-angle X-ray scattering (WAXS) techniques [1,2]. Another interesting example involves the origin of high activity in spinel-type Co3O4 thin film catalysts, elucidated by high-energy surface X-ray diffraction (HE-SXRD). Here, the superior performance is attributed to the formation of a 3D CoOx(OH)y active phase skin layer during activation, and its thickness defines the final activity [3].In the case of catalysts operating in an acidic environment, RuOx and IrOx are acknowledged as promising materials. While RuOx exhibits high activity, it is prone to instability, whereas IrOx, although stable, demonstrates lower activity and have significantly higher price. A prevailing trend is to create solid solution alloys of Ir and Ru to capitalize on the strengths of both materials [4]. This contribution details structural investigations of a series of IrRu alloys with varying compositions prepared through DC magnetron sputtering. The study investigates the unusual stability of these materials at high current densities using operando WAXS and a custom-built electrolyzer cell [5]. The findings reveal that these alloys undergo Ru dissolution upon activation, forming a thin amorphous IrOx layer that protects the alloy underneath. The stability is defined by this layer, while the activity is mainly determined by the electronic structure of the IrRu alloy core.The examples presented are a reminder that without operando characterization of the materials it is very difficult to ascribe origins of activity and stability, as the ex-situ characterization might be misleading regarding the structure and electronic structure of the active phase.[1] Dionigi, F. et al. In-situ structure and catalytic mechanism of NiFe and CoFe layered double hydroxides during oxygen evolution. Nature Communications, 2020, 11. https://doi.org/10.1038/s41467-020-16237-1[2] Dresp, S. et al., Molecular Understanding of the Impact of Saline Contaminants and Alkaline pH on NiFe Layered Double Hydroxide Oxygen Evolution Catalysts. ACS Catalysis, 2021, 11, 6800–6809. https://doi.org/10.1021/acscatal.1c00773.[3] Wiegmann, T. et al., OperandoIdentification of the Reversible Skin Layer on Co3O4 as a Three-Dimensional Reaction Zone for Oxygen Evolution. ACS Catalysis, 2022, 12, 3256–3268. https://doi.org/10.1021/acscatal.1c05169.[4] Galyamin, D. et al, Unraveling the Most Relevant Features for the Design of Iridium Mixed Oxides with High Activity and Durability for the Oxygen Evolution Reaction in Acidic Media. JACS Au, 2023, 3, 2336–2355. https://doi.org/10.1021/jacsau.3c00247.[5] Moss, A. B. et al., Versatile High Energy X-Ray Transparent Electrolysis Cell for Operando Measurements. Journal of Power Sources, 2023, 562, 232754. https://doi.org/10.1016/j.jpowsour.2023.232754.

(Invited) Hierarchically Structured Electrocatalysts Using Scalable Synthesis Techniques for Membrane Water Electrolyzers

Beyond composition, the morphology of catalyst particles is a key-parameter to allow for a high accessibility to catalytic sites but it is also of paramount importance to manage gases and water transport within catalyst layers in membrane-electrode assembly based devices. Besides their electrochemical activity, fabricating high performance catalysts and catalyst layers that are compatible with industry fabrication processes is critical for their implementation in commercial electrochemical devices. Considering these requirements, we are developing green, cheap and scalable solution synthesis techniques to prepare hierarchically structured catalysts that can be readily incorporated into catalyst layers.Two strategies will be discussed. We have recently introduced an aerosol synthesis technique for the preparation of highly porous iridium pure and mixed oxides that are highly active and stable towards the Oxygen Evolution Reaction in acidic media. Beside beeing ideally suited for the preparation of highly porous catalyst layers, the hierarchical morphology can also be used for fundamental studies [1] or used as a probe to follow the catalyst degradation in PEM water electrolysis devices.[2]We also implemented the well-known polyol process [3] to prepare heterofunctional catalysts with ultra-low PGM content that are active towards another challenging reaction in anion exchange membrane water electrolyzer: the Hydrogen Evolution Reaction in alkaline media. The structure-properties relationship in these materials is assessed by a large set of techniques including SEM, XRD, XRF and STEM-EDX as well as surface (XPS) and bulk (XAS) characterizations, including operando XAS. Nature Communications, 2021, 12, 3935, 1038/s41467-021-24181-x Chemistry of Materials, 2023, 35, 20, 8590–8598, 1021/acs.chemmater.3c0152. Chem. Soc. Rev. , 2018, 47, 5187-5233, 10.1039/C7CS00777A

Deciphering the Atomic-Scale Degradation of Carbon-Supported Platinum–Yttrium Nanoalloys during the Oxygen Reduction Reaction in Acidic Medium

Deciphering the Atomic-Scale Degradation of Carbon-Supported Platinum–Yttrium Nanoalloys during the Oxygen Reduction Reaction in Acidic Medium

Microwave heating-assisted synthesis of ultrathin platinum-based trimetallic nanosheets as highly stable catalysts towards oxygen reduction reaction in acidic medium

There are currently almost no ternary platinum-based nanosheets used for acidic oxygen reduction reactions (ORR) due to the difficulty in synthesizing ternary nanosheets with high Pt content. In this work, several ultrathin platinum-palladium-copper nanosheets (PtPdCu NSs) with a thickness of around 1.90 nm were prepared via a microwave heating-assisted method. Microwave heating allows a large number of Pt atoms to deposit into PdCu nanosheets, forming Pt-based ternary nanosheets with high Pt content. Among them, Pt38Pd50Cu12 NSs catalyst displays the highest mass activity (MA) measured in 0.1 M HClO4 of 0.932 A/mgPt+Pd which is 8.6 times of that Pt/C. Besides, Pt38Pd50Cu12 NSs catalyst also exhibits excellent stability with an extremely low MA attenuation after 80,000 cycles accelerated durability testing (ADT) tests. In the single cell tests, the Pt38Pd50Cu12 NSs catalyst manifests higher maximum power density of 796 mW cm−2 than Pt/C of 606 mW cm−2. Density functional theory (DFT) calculations indicate the weaker adsorption between Pt and O-species in Pt38Pd50Cu12 NSs leads to a significant enhancement of ORR activity. This study provides a new strategy to design and prepare ultrathin Pt-based trimetallic nanosheets as efficient and durable ORR catalysts.

Behaviour of Pt10-xRux/C catalysts towards the hydrogen oxidation reaction in acidic medium in the presence of adsorbed CO

Pt10-xRux/C materials are synthesised using a classical polyol method and comprehensively characterised by thermogravimetric analysis, inductively coupled plasma – optical emission spectroscopy, electron transmission microscopy and x-ray diffraction. In N2-saturated electrolyte, the PtRu/C catalysts display lower onset potentials for adsorbed CO (COads) removal than the pure Pt/C one. Although the surface coverages of Pt by Ru are high, the PtRu/C catalysts display higher activity than the Pt/C one towards the hydrogen oxidation reaction (HOR), but the same mechanism occurs on all the catalysts. However, when the surface of the catalysts is saturated by COads, the HOR starts at a lower potential on Pt/C than on PtRu/C; Pt/C displays higher activity toward the HOR in the presence of COads between 0.40 and 0.55 V vs RHE. On Pt/C, a small part of COads desorbs into CO2 from 0.40 V through an Eley-Rideal mechanism, freeing very active Pt sites for the HOR. For potentials higher than 0.55 V vs RHE, the PtRu/C catalysts display higher activity for COads removal through the bifunctional mechanism. Ru atoms also block the most active Pt sites for the COads removal and the HOR.

Nucleation, growth and bubble detachment in liquid-vapor phase change on structured surfaces

Comprehensive grasp of heat and mass transfer, particularly in applications involving liquid-vapor phase change, hinges on management of nucleation, growth, and detachment of vapor bubbles. Various parameters influence the dynamics of phase-change heat and mass transfer and thus dictate the interactions between the surface, the liquid, and the vapor, profoundly impacting the underlying processes. To tailor these phenomena and harness them for technical applications involving high heat flux densities and intense mass transfer, such as boiling and electrolysis, surface functionalization is under intense development. By designing structured surfaces and creating preferential nucleation sites that promote heterogeneous nucleation, it is possible to exert control over the location and density of active nucleation sites on the surface. This, in turn, enables the regulation of bubble growth and detachment from the surface. With the aim of identifying optimal surface treatments for functionalizing surfaces and enhancing their performance in phase-change applications, we evaluated the nucleation, growth and detachment of a single bubble in a liquid-vapor phase change on untextured and laser-textured surfaces during water electrolysis. Platinum was chosen as the preferential material due to its favourable electrochemical properties for the hydrogen evolution reaction in acidic media. Electrolysis was performed at various voltages and the bubble dynamics were evaluated through high-speed imaging to investigate the intricacies of bubble growth and their mutual interactions. At 3.5 V using the laser textured surface, hydrogen bubbles detaching from the electrode surface had on average 40% smaller diameter, while the frequency of their detachment was 2,5-times higher compared to the untextured surface. This opens the possibility for further research that could lead to improving the efficiency of electrolysis.

Ruthenium-Based Binary Alloy with Oxide Nanosheath for Highly Efficient and Stable Oxygen Evolution Reaction in Acidic Media.

Traditional noble metal oxide, such as RuO2, is considered a benchmark catalyst for acidic oxygen evolution reaction (OER). However, its practical application is limited due to sluggish activity and severe electrochemical corrosion. In this study, Ru-Fe nanoparticles loading on carbon felt (RuFe@CF) is synthesized via an ultrafast Joule heating method as an active and durable OER catalyst in acidic conditions. Remarkably low overpotentials of 188 and 269mV are achieved at 10 and 100mA cm-2, respectively, with a robust stability up to 620 h at 10mA cm-2. When used as an anode in a proton exchange membrane water electrolyzer, the catalyst shows more than 250 h of stability at a water-splitting current of 200mA cm-2. Experimental characterizations reveal the presence of a Ru-based oxide nanosheath on the surface of the catalyst during OER tests, suggesting a surface reconstruction process that enhances the intrinsic activity and inhibits continuous metal dissolution. Moreover, density functional theory calculations demonstrate that the introduction of Fe into the RuFe@CF catalyst reduces the energy barrier and boosts its activities. This work offers an effective and universal strategy for the development of highly efficient and stable catalysts for acidic water splitting.

Enhancing Intrinsic Electrocatalytic Activity of Pt/C Nanoparticles for Oxygen Reduction Reaction in Acidic Media by Microwave-Assisted Synthesis

Abstract: This study is focused on the enhancement of the intrinsic electrocatalytic activity of Pt nano-particles supported on C (Pt/C NPs) towards Oxygen Reduction Reaction (ORR) in acidic media. The goal was to investigate the effect of microwave-assisted synthesis on the electrocatalytic performance of Pt/C NPs towards ORR. Thus, Pt/C NPs were synthesized using a microwave-assisted method and by a conventional heating method; structural and morphological characteristics were analyzed by X-ray dif-fraction (XRD) and transmission electron microscopy (TEM). Electrochemical studies were performed using the rotating disk electrode technique to evaluate the ORR performance. Microwave-assisted syn-thesis produced Pt/C NPs with a smaller particle size (6.3 ± 0.2 nm) than conventionally synthesized nanoparticles (8.6 ± 0.3 nm). Electrochemical analysis showed that the microwave-synthesized Pt/C NPs exhibited higher mass activity (4.6 ± 0.8 mA･g-1Pt) for ORR compared to conventionally synthesized nanoparticles (1.9 ± 0.4 mA･mA･g-1Pt). These results demonstrate that microwave-assisted synthesis en-hances the intrinsic electrocatalytic activity of Pt/C NPs for ORR in acidic media. These findings have important implications for the development of efficient electrocatalysts for fuel cell applications. Background: The synthesis and characterization of platinum nanoparticles on C are crucial for advancing electrocatalysis, particularly in the context of potential applications in fuel cells. This study builds on previous research, focusing on two distinct synthesis methods to enhance our understanding of their im-pact on nanoparticle properties and electrocatalytic performance. Objective: To investigate the synthesis efficiency, structural characteristics, and electrocatalytic activities of platinum nanoparticles on C using microwave-assisted heating and conventional synthesis reactor heating. The objective is to discern any significant differences in particle size, structure, and electrocata-lytic performance between the two synthesis methods. Methods: The synthesis involved a comparative analysis of platinum nanoparticles using microwave-assisted and conventional heating methods. Chemical composition analysis verified the synthesis efficiency, and structural and morphological characterizations were performed using X-ray Diffraction and Transmission Electron Microscopy. Electrochemical studies employed the rotating disk electrode technique, with activation and evaluation conducted through cyclic voltammetry, and the oxygen reduction reaction studied via linear sweep voltammetry in an acidic media (0.5 mol⋅L-1 H2SO4). Results: Well-supported platinum nanoparticles with a face-centered cubic structure were obtained on C using both synthesis methods. However, microwave-synthesized particles (6.3 ± 0.2 nm) exhibited a smaller size compared to conventionally synthesized particles (8.6 ± 0.3 nm). Electrochemical assess-ment revealed superior mass activity for microwave-synthesized material (4.6 ± 0.8 mA･g-1Pt), outper-forming commercial Pt nanoparticles (3.0 ± 0.3 mA･g-1Pt) and conventionally synthesized material (1.9 ± 0.4 mA･mA･g-1Pt). Conclusion: This study concludes that microwave-assisted synthesis yields platinum nanoparticles on C with enhanced electrocatalytic performance, as evidenced by the smaller particle size and superior mass activity compared to conventionally synthesized material and commercial Pt nanoparticles. These findings highlight the potential of microwave-synthesized Pt nanoparticles for applications in fuel cells.

Ce-Doped TiO2 Fabricated Glassy Carbon Electrode for Efficient Hydrogen Evolution Reaction in Acidic Medium.

The quest for sustainable and clean energy sources has intensified research on the Hydrogen Evolution Reaction (HER) in recent decades. In this study, we have presented a novel Ce-doped TiO2 catalyst synthesized through the sol-gel method, showcasing its potential as a superior electrocatalyst for HER in an acidic medium. Comprehensive characterization through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Energy dispersive X-ray (EDX), and Raman spectroscopy confirms the successful formation of the catalyst. Electrocatalytic performance evaluation, including open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and Tafel analysis, demonstrates that GCE-5wt.%CeTiO2 outperforms bare GCE, as well as Ce and TiO2-based electrodes. Kinetic investigations reveal a Tafel slope of 105 mV dec-1, indicating the Volmer step as the rate-determining step. The onset potential for HER at GCE-5wt.%CeTiO2 is -0.16 V vs. RHE, close to the platinum electrode. Notably, the catalyst exhibits a low overpotential of 401 mV to achieve a current density of 10 mA cm-2 with an impressive 95 % Faradaic efficiency. Furthermore, the catalyst demonstrates outstanding durability, maintaining a negligible increase in overpotential during a 14-hour chronoamperometry test. These results have far-reaching implications for the development of cost-effective and efficient electrocatalysts for hydrogen production.