Two-step Electrodeposition Research Articles

Two-step electrodeposition to achieve durable IrOx electrode with a semi-crystalline structure for efficient OER

The Development of highly catalytically active and stable anodes for oxygen evolution reaction (OER) in acidic media remains a great challenge. Herein, we proposed a two-step electrodeposition method to optimize an amorphous electrodeposited IrOx electrode (eⅡ-IrOx/Ti). The introduction of a pre-deposition layer, prepared by triangular wave electrodeposition, contributes to the enhancement of surface oxygen vacancies, resulting in a semi-crystalline structure. Compared to directly potentiostatic electrodeposited IrOx electrode (e-IrOx/Ti) and industrially thermally decomposed IrO2 electrode (IrO2–Ta2O5/Ti) at the same iridium loading level, eⅡ-IrOx/Ti exhibited superior OER performance, with a Tafel slope of 52.85 mV/dec and an overpotential as low as 218 mV at 10 mA/cm2. Moreover, eⅡ-IrOx/Ti demonstrates remarkable stability while continuously catalyzing OER at 250 mA/cm2 for 100 h, with little performance decay and a stability number of 3.397 × 106 (comparable to crystal IrO2). The semi-crystalline structure of eII-IrOx/Ti, rich in oxygen vacancies, facilitates the synergistic effect of amorphous and crystalline phases, indicating the potential of electrodeposited IrOx electrodes for sustained and efficient OER in acidic environments.

Crystal facet engineering coexposed CuIn (200) and In (101) in CuIn alloy nanocatalysts enabling selective and stable CO2 electroreduction

The electrocatalytic carbon dioxide reduction reaction (eCO2RR) into high-value-added chemicals and fuels is a promising strategy to mitigate global warming. However, it remains a significant stumbling block to the rationally tuning lattice plane of the catalyst with high activity to produce the target product in the eCO2RR process. To attempt to solve this problem, the CuIn bimetallic alloy nanocatalyst with specifically exposed lattice planes is modulated and electrodeposited on the nitrogen-doped porous carbon cloth by a simple two-step electrodeposition method, which induces high Faraday efficiency of 80% towards HCOO− (FEHCOO−) with a partial current density of 13.84 mA cm−2 at −1.05 V (vs. RHE). Systematic characterizations and theoretical modeling reveal that the specific coexposed CuIn (200) and In (101) lattice facets selectively adsorbed the key intermediate of OCHO*, reducing the overpotential of HCOOH and boosting the FEHCOO− in a wide potential window (−0.65–−1.25 V). Moreover, a homogeneous distribution of CuIn nanoparticles with an average diameter of merely ∼3.19 nm affords exposure to abundant active sites, meanwhile prohibiting detachment and agglomeration of nanoparticles during eCO2RR for enhanced stability attributing to the self-assembly electrode strategy. This study highlights the synergistic effect between catalytic activity and facet effect, which opens a new route in surface engineering to tune their electrocatalytic performance.

Dual-functional MnS2/MnO2 heterostructure catalyst for efficient acidic hydrogen evolution reaction and assisted degradation of organic wastewater

The design and synthesis of non-precious metal dual-functional electrocatalysts through the modulation of electronic structure are important for the development of renewable hydrogen energy. Herein, MnS2/MnO2-CC heterostructure dual-functional catalysts with ultrathin nanosheets were prepared by a two-step electrodeposition method for efficient acidic hydrogen evolution reaction (HER) and degradation of organic wastewater (such as methylene blue (MB)). The electronic structure of Mn atoms at the MnS2/MnO2-CC heterostructure interface is reconfigured under the joint action of S and O atoms. Theoretical calculations show that the Mn d-band electron distribution in MnS2/MnO2-CC catalyst has higher occupied states near the Fermi level compared to the MnO2 and MnS2 catalysts, which indicates that MnS2/MnO2-CC catalyst has better electron transfer capability and catalytic activity. The MnS2/MnO2-CC catalysts require overpotential of only 66 and 116 mV to reach current density of 10 and 100 mA cm−2 in MB/H2SO4 media. The MnS2/MnO2-CC catalyst also has a low Tafel slope (26.72 mV dec−1) and excellent stability (the performance does not decay after 20 h of testing). In addition, the MB removal efficiency of the MnS2/MnO2-CC catalyst with a better kinetic rate (0.0226) can reach 97.76%, which is much higher than that of the MnOx-CC catalyst (72.10%). This strategy provides a new way to develop efficient and stable non-precious metal dual-functional electrocatalysts for HER and organic wastewater degradation.

Corrosion-engineered NiMnFe(OH)x@NiMn/TP core–shell electrode for anion exchange membrane water electrolyzers

Exploring cost-effective and highly efficient electrodes is crucial for realizing future renewable energy systems for anion exchange membrane water electrolyzers (AEMWE). There are two half-reactions that occur during water electrolysis, and the development of an effective electrode for the sluggish oxygen evolution reaction (OER) is considered as a key aspect of the half-reaction. In this study, a ternary metal hydroxides electrode was fabricated using a two-step (electrodeposition and corrosion engineering) process. The hydrogen bubble templating electrodeposition enabled the control of the morphology from a dense film to a porous coral-like electrode. Furthermore, Fe was introduced to the electrode to form a core–shell structure via corrosion engineering. The OER catalytic activities of the electrodes were compared in a half-cell, and the results indicated that the optimized electrode required values of 322 mV at 50 mA cm−2. Additionally, stability test was conducted at 100 mA cm−2 for 12 h, and the results indicated that the variation ratio was observed at 1.90 mV h−1. The optimized NiMnFe(OH)x@NiMn/TP was utilized into a membrane electrode assembly (MEA) as an anode, and the catalytic activity of the anode was tested in a single-cell of AEMWE, and it exhibited a current density of 1.5 A cm−2 at 2.02 Vcell and maintained its performance for more than 50 h.

Single-atoms Ru/NiFe layered double hydroxide electrocatalyst: Efficient for oxidation of selective oxidation of 5-hydroxymethylfurfural and oxygen evolution reaction

The adsorption performance modulation of catalysts on reactants is effective for the improvement of catalytic oxidation reactions. Ru is beneficial for adsorption of products. Here, the single Ru atoms were supported on NiFe layered double hydroxide (LDH) (Ru0.3/NiFe) to enhance the adsorption capacity of catalyst using a two-step electrodeposition method. Ru0.3/NiFe was used in the oxygen evolution reaction (OER) and the selective oxidation of 5-hydroxymethylfurfural (HMFOR). Ru0.3/NiFe showed extremely low overpotential (243 mV at 10 mA cm-2) and excellent durability in OER. Ru0.3/NiFe exhibits excellent HMF conversion (99.43%), 2,5-furan dicarboxylic acid (FDCA) selectivity (99.24%) and yield (98.68%) in HMFOR. The possible HMFOR reaction pathway was further studied, revealing that the load of Ru enhances the path from HMF to DFF, thereby improving the yield of FDCA. Both the outcomes of experimental findings and density functional theory (DFT) calculations indicate that increasing the composition of Ru optimizes the adsorption energy of HMF compared to NiFe, allowing FeNiOOH to more efficiently capture protons and electrons in HMFOR.

Enhancement in pool boiling performance of GNP/Cu-Al2O3 nano-composite coated copper microporous surface

An experimental analysis of pool boiling is conducted on the GNP/Cu-Al2O3 (GNP-graphene nano particle) nanocomposite coated copper surfaces at atmospheric pressure using DI (distilled water) as boiling fluid. A two-step electro-deposition technique is used for fabrication of these micro/nano porous coated surfaces. A modified surface structure is formed due to this deposition and various surface morphology parameters such as surface structure, roughness, wettability are analysed. Results show the enhancement in BHTC (boiling heat transfer coefficient) and CHF (Critical heat flux) in nano composite coated surfaces compare to the bare copper surface. The maximum CHF of 2415 (kW/m2) and BHTC of 171.28 (kW/m2K) is found in the NCCS (nano-composite coated superhydrophilic) surfaces which are 122% and 239% more than the bare copper surfaces. The boiling performance is augmented mainly because of the improvement in roughness, wettability and also for the high thermal conductivity of the GNP/Cu- Al2O3 nano coating. Quantitative study of the bubble dynamics like active nucleation site density, bubble emission frequency, departure diameter of bubbleand their impact on heat transfer performance in the case of NCCS surfaces is performed with high-speed visualization.

In-situ electrodeposited Co0.85Se@Ni3S2 heterojunction with enhanced performance for supercapacitors

Rational design of porous heterostructured electrode materials for high-performance supercapacitors remains a big challenge. Herein, we report the in situ synthesis of Co0.85Se@Ni3S2 hybrid nanosheet arrays supported on carbon cloth (CC) substrate though an efficient two-step electrodeposition method. Compared with pure Co0.85Se and Ni3S2, the well-defined Co0.85Se@Ni3S2 heterojunction possesses enriched active sites, improved electrical conductivity, and reduced ion diffusion resistance. Benefiting from its hierarchically porous nanostructure and the synergistic effect of Co0.85Se and Ni3S2, the as-synthesized Co0.85Se@Ni3S2 electrode delivers a gravimetric capacitance (Cg)/volumetric capacitance (Cv) of 1644.1F g−1/3161.7F cm−3 at 1 A g−1, outstanding rate capability of 60.7% capacitance retention at 20 A g−1, as well as good cycling performance of 87.8% capacitance retention after 5000 cycles. Additionally, a hybrid supercapacitor (HSC) device presents a maximum energy density (E) of 65.7 Wh kg−1 at 696.2 W kg−1 with 93.3% cyclic durability after 15,000 cycles. Thus, this work proposes a simple and effective strategy to fabricate porous heterojunctions as high-performance electrode materials for energy storage devices.

Controlled synthesis of Fe-Ni-S@CoSe2 on nickel foam as an efficient electrocatalyst for oxygen evolution reaction

Serious environmental pollution caused by fossil fuel consumption and urgent energy demand caused by human social development have forced mankind to develop green and reusable energy. Hydrogen energy has received significant attention and because of its eco-friendly, pure and carbon-free. In this paper, OER electrocatalyst Fe-Ni-S@CoSe2/NF covered by nanoparticles Fe-Ni-S (Fe4.005Ni4.995S8) on CoSe2 ultra-thin nanosheets was prepared with a two-step electrodeposition taking nickel foam (NF) into account as the substrate. On the basis of maintaining the CoSe2 electrocatalytic performance, the participation of Fe-Ni-S has greatly improved the OER and water electrolysis performance of Fe-Ni-S@CoSe2/NF composite. Electrochemical assay revealed that Fe-Ni-S@CoSe2/NF-700 possessed superb OER activity for 1 M KOH solution. The overpotential was 180 mV at 10 mA cm−2. In addition, overpotential showed no obvious variation over 20 h stability test, indicating remarkable overall water electrolysis performance and excellent term resistance of electrocatalyst. This work gives constructive ideas for the preparation of cost-effective green water electrolysis catalyst.

Construction of an electrode with hierarchical three-dimensional NiFe-oxyhydroxides by two-step electrodeposition for large-current oxygen evolution reaction

Oxygen evolution reaction (OER) electrocatalysts are promised to be extremely important in hydrogen generation of water electrolysis as one of the renewable energy technologies. However, low efficiency and high cost are two crucial barriers that hinder its development and application. Herein, we developed highly efficient NiFe-based self-supported electrocatalysts by a facile two-step electrodeposition method focusing on the porosification of a nickel foam (NF) substrate. The porous nickel layer (PN/NF) formed in the first step by dynamic hydrogen bubble template electrodeposition proved to be effective in facilitating the mass transfer process, and the following second step of nickel-iron deposition (NiFe/PN/NF) continued to increase the intrinsic catalytic activity, with the two synergistically contributing to the excellent OER performance. As an oxygen evolution electrode, it exhibits high catalytic activity in alkaline water electrolysis, which requires only an overpotential of 211 mV to promote the oxidation reaction of water. The overpotentials for the OER at 100, 500 and 750 mA cm−2 are as low as 244, 297 and 326 mV in 1 M KOH, respectively. In 6 M KOH, the overpotentials for driving electrolytic oxygen production at 100, 500, 750 and 1000 mA cm−2 are even lowered spectacularly to 133 mV, 178 mV, 193 mV and 208 mV, respectively. In particular, the catalyst showed a catalytic stability of more than 40 h at a current density of 500 mA cm−2, which presents it as a highly promising candidate for future large-scale industrial applications.

Insight into the Key Restriction of BiVO4 Photoanodes Prepared by Pyrolysis Method for Scalable Preparation.

Bismuth Vanadate (BiVO4 ) photoanode has been popularly investigated for promising solar water oxidation, but its intrinsic performance has been greatly retarded by the direct pyrolysis method. Here we insight the key restriction of BiVO4 prepared by metal-organic decomposition (MOD) method. It is found that the evaporation of vanadium during the pyrolysis tends to cause a substantial phase impurity, and the unexpected few tetragonal phase inhibits the charge separation evidently. Consequently, suitably excessive vanadium precursor was adopted to eliminate the phase impurity, based on which the obtained intrinsic BiVO4 photoanode could exhibit photocurrent density of 4.2 mA cm-2 at 1.23 VRHE under AM 1.5 G irradiation, as comparable to the one fabricated by the currently popular two-step electrodeposition method. Furthermore, the excellent performance can be maintained on the enlarged photoanode (25 cm2 ), demonstrating the advantage of MOD method in scalable preparation. Our work provides new insight and highlights the glorious future of MOD method for the design of scale-up efficient BiVO4 photoanode.

In-depth analysis of corrosion-resistance and dynamic stability of superhydrophobic copper developed by a green approach

This study gives a systematic analysis of corrosion resistant behaviour of superhydrophobic copper fabricated by two-step (electrodeposition followed by coating) and one-step (coating without electrodeposition) processes using behenic acid. Wetting and corrosion characteristics of coated copper have been continuously evaluated by abrasion with sand paper, immersion in acidic and alkaline solutions, and heating at elevated temperature. Although, wetting properties of coating have been obviously decreased with continuous abrasion, contact with acidic and alkaline ambiance, and hot temperature exposure, but corrosion properties of coated copper have not shown the similar trends which has been discussed through polarisation tests and EIS study in detail. Additionally aforesaid both processes generate durable superhydrophobic copper surface with excellent corrosion-resistant and anti-wetting characteristics; however, a two-step process is proved more efficient than the one-step process and promises to produce anti-wetting coatings for real-world applications.

Interfacial electronic coupling of V-doped Co2P with high-entropy MXene reduces kinetic energy barrier for efficient overall water splitting

Developing efficient, low-cost non-noble metal-based bifunctional catalysts to achieve excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics in alkaline media is challenging but very meaningful. However, improving the electronic structure of the catalyst to optimize the adsorption of intermediates and reduce the reaction energy barrier is the key to improve the reaction efficiency. Herein, a V-doped Co2P coupled with high-entropy MXene heterostructure catalyst (V-Co2P@HE) was prepared by a two-step electrodeposition and controlled phosphorization process. The analyses of X-ray absorption spectroscopy, X-ray photoelectron spectroscopy and theoretical calculations jointly show that the introduction of V and the strong electron coupling between the two components optimize the adsorption energy of water molecules and reaction intermediates. Benefiting from the abundant active sites and optimizing intermediate adsorption energy and heterogeneous interface electronic structure, V-Co2P@HE has excellent HER and OER activity and long-term stability under alkaline condition. In particular, when assembled as cathode and anode, the bifunctional V-Co2P@HE catalyst can drive a current density of 10 mA cm−2 with only 1.53 V. This work provides new strategies for the application of high-entropy MXene and the design of novel non-noble metal-based bifunctional electrolytic water catalysts.

Facile two-step Electrodeposition Synthesis of CuO Nanowires for Ultrasensitive Non-Enzymatic Sensing of Glucose

Facile two-step Electrodeposition Synthesis of CuO Nanowires for Ultrasensitive Non-Enzymatic Sensing of Glucose

Achieving the high-energy-density asymmetric supercapacitor by hierarchical molybdenum-vanadium-sulphide@covalt sulphide core–shell nanoporous hybrid as cathode and iron oxide@carbon-nanofibers/nitrogen-doped reduced graphene oxide aerogel as anode

In recent decades, supercapacitors have attracted much research as low-cost, reliable, and environment-friendly energy storage devices. However, the low energy density and low operating voltage limit its wide applications. Herein, a novel 1D–2D constructed 3D multicomponent Mox:Vy–S@Co9S8 core–shell nanowires array is designed and fabricated as the cathode material through a simple and economical two-step hydrothermal reaction and electrodeposition process. The constructed 3D Mo0.5V0.5–S@Co9S8 electrode exhibits excellent charge storage capability; an area capacity of 0.91 mA h cm−2 with a corresponding specific capacity of 480.9 mA h g−1 at 2 mA cm−2. Moreover, a solid-state ASC (SS–ASC) is assembled with the as-obtained Fe2O3@CNFs/N–rGO aerogel as the anode, the constructed 3D Mox:Vy–S@Co9S8 NWAs as cathode, and KOH–PVA–gel as a gel electrolyte. As proof of concept, the assembled SS–ASC display an excellent operating voltage window of ~1.7 V and an outstanding energy density of ~108.47 W h kg−1 at ~520.65 W kg−1 power density. Also, when connected in series, the two SS–ASC devices can run an electronic clock for 30 min, demonstrating the practicability of the constructed 3D Mox:Vy–S@Co9S8 NWAs as a promising electrode material for the development of the high energy density ASC.

Preparation and characterization of PMT-TiO2-NTs@NiO–C/Sn–Sb composite electrodes by a two-step pulsed electrodeposition method for the degradation of crystalline violet

To overcome the limitations imposed by Sn–Sb electrodes, the titanium foam (PMT)-TiO2-NTs@NiO–C/Sn–Sb composite electrodes with cubic crystal structure are synthesized by introducing NiO@C nanosheet arrays interlayer on the TiO2-NTs/PMT matrix through hydrothermal and carbonization process. Then a two-step pulsed electrodeposition method is used to prepare the Sn–Sb coating. Benefiting from the advantages of stacked 2D layer-sheet structure, the obtained electrodes exhibit enhanced stability and conductivity. Synergy of inner and outer layers fabricated by different pulse times strongly influence the electrochemical catalytic properties of the PMT-TiO2-NTs@NiO–C/Sn–Sb (Sn–Sb) electrode. Hence, the Sn–Sb (b0.5 h + w1 h) electrode is the optimal electrode to degrade the Crystalline Violet (CV). Next, the effect of the four experimental parameters (initial CV concentration, current density, pH value and supporting electrolyte concentration) on the degradation of CV by the electrode are investigated. The degradation of the CV is more sensitive to alkaline pH, and the rapid decolorization of CV when the pH is 10. Moreover, the possible electrocatalytic degradation pathway of CV is performed using HPLC-MS. Results from the tests show that the PMT-TiO2-NTs/NiO@C/Sn–Sb (b0.5 h + w1 h) electrode is an interesting alternative material in industrial wastewater applications.

Enhancing electrochemical and photoelectrochemical degradation of organic dyes under visible irradiation with a novel Cu2O/BaHPO4-based photoelectrode

A highly active Cu2O/BaHPO4 photoanode was obtained using a simple two-step electrodeposition technique. The synthesised material was characterised by various methods, including X-ray diffraction (XRD), which revealed the orthorhombic phase of BaHPO4 and the cubic phase of Cu2O, while scanning electron microscopy coupled to energy dispersive X-ray spectroscopy (SEM-EDX) showed the platelet and prism morphology of BaHPO4 and Cu2O, respectively. The optical features of both compounds as well as their band gap energies were also evaluated and calculated using diffuse reflection spectroscopy (DRS). The vibrational properties of the photoanode were studied using Fourier transform infrared (FT-IR). The electrocatalytic activity (EC) of the samples were evaluated using a central composite design for surface response methodology (CCD-RSM) to determine the optimal conditions for Rhodamine B (RhB) degradation. The photoelectrocatalytic performance (PEC) of the Cu2O/BaHPO4 photoanode was about 98% in 5 min of reaction under visible irradiation, which was higher than BaHPO4 and Cu2O alone significating a quick separation of photoexcited carriers thanks to the excellent synergetic properties exhibited by the composite. This finding was corroborated by the results obtained from electrochemical impedance spectroscopy (EIS) and Mott-Schottky (MS) analysis. Various cationic and anionic dyes could be efficiently degraded. In addition, after 8 cycles, a non-significant decrease in the degradation rate was observed confirming the high cyclability of the photoanode. Therefore, Cu2O/BaHPO4 can be considered as a promising candidate for the efficient degradation of organic pollutants.

Electrodeposition of amorphous Ni–Fe–Mo composite as a binder-free and high-performance electrocatalyst for hydrogen generation from alkaline water electrolysis

Exploration of efficient and earth-abundant catalysts is critical to developing hydrogen energy through electrochemical overall water splitting. In this work, highly porous three-dimensional binder-free amorphous structure NiFeO/NiMo nanospheres are synthesized on Ni foam (NF) by simple and cost-effective two-step hydrothermal and electrodeposition processes, respectively. The first findings show that the porous NiFeO/NiMoO/NF electrode has good long-term stability for the hydrogen evolution reaction (HER) in alkaline water electrolysis and better catalytic activity (requires an overpotential of 46 mV to drive current density (j) of 10 mA cm−2).The excellent HER performance and reasonable stability of the amorphous NiFeO/NiMoO/NF electrocatalyst can be caused by the impact of intermediate coating (NiMoO) as a binder to the fabrication of the final catalyst, which enables a synergistic effect of metallic Ni, Fe, and Mo for efficient HER. Designing a multimetallic alloy represents a promising new route to developing efficient, low-cost noble-metal-free catalysts and their applications in the rising hydrogen revolution.

Bi-functional Ni-Co-P/rGO/NF flower-like structure as an electrocatalyst for hydrogen production assisted by urea oxidation reaction

Replacing the inert oxygen evolution reaction (OER) with alternative electrochemical reactions is critical for large-scale hydrogen generation. Here the Ni-Co-P flower-like nanostructure coated on reduced graphene oxide which was synthesized via two-step electrodeposition method (as Ni-Co-P/rGO/NF) is described. First, rGO was deposited on the nickel foam precursor by the pulse-reverse electrodeposition, then Ni-Co-P nano-layer by the Chronoamperometry was electrodeposited. The η10 for HER and UOR was 53 mV and 1.23 V, respectively, demonstrate enhanced electrocatalytic activity. XRD, XPS, and TEM analysis revealed that the Ni-Co-P/rGO catalyst has a flower-like structure depending on its composition. In the two-electrode cell at a voltage of 1.35 V, the generated current density of urea electrolysis (37.84 mA cm−2 in 0.33 M urea + 1.0 M KOH electrolyte) was 3.31 times greater than that of the conventional water splitting (11.41 mA cm−2). According to the findings, Ni-Co-P/rGO could be employed as a dual-functional catalyst toward UOR and HER for energy-saving and H2 generation.

Fabrication of modified electrode by reduced graphene oxide (rGO) and polyaniline (PANI) for enhancing azo dye decolorization in bio-electrochemical systems (BESs)

Bio-electrochemical systems (BESs) have attracted wide attention in the field of wastewater treatment owing to their fast electron transfer rate and high performance. Unfortunately, the low electro-chemical activity of carbonaceous materials commonly used in BESs remains a bottleneck for their practical applications. Especially, for refractory pollutants remediation, the efficiency is largely limited by the cathode property in term of (bio)-electrochemical reduction of highly oxidized functional groups. Herein, a reduced graphene oxide (rGO) and polyaniline (PANI) modified electrode was fabricated via two-step electro-deposition using carbon brush as raw material. Benefiting from the modified graphene sheets and PANI nanoparticles, the rGO/PANI electrode shows highly conductive network with the electro-active surface area increased by 12 times (0.013 mF cm−2) and the charge transfer resistance decreased by 92% (0.23Ω) comparing with the unmodified one. Most importantly, the rGO/PANI electrode used as abiotic cathode achieves highly efficient azo dye removal from wastewater. The highest decolorization efficiency reaches 96 ± 0.03% within 24 h and the maximum decolorization rate is as high as 20.9 ± 1.45 g h−1·m−3. The features of improved electro-chemical activity and enhanced pollutant removal efficiency provide a new insight toward development of high performance BESs via electrode modification for practical application.

Electrochemical CO2 reduction on few-atomic-layer bismuth nanosheets

This work reports on few-atomic-layer thin bismuth nanosheets (BiNSs) prepared via two-step electrodeposition method with Br-as structure-inducing-agent for electrochemical CO2 reduction towards formate. The BiNSs exhibit an impressive CO2 reduction reaction performance of large current density and high Faradic efficiency to produce formate. We further examine the effect of bicarbonate ion migration in CO2 electrochemical reduction process. The magneto-current density and thus the formate yield can be significantly increased in the presence of magnetic field. The CO2 reduction reaction on BiNSs electrodes in magnetic field processes with a high Faradic efficiency over 90% in a wide potential range from −0.68 V to −1.13 V (vs. RHE). Detailed investigation including in-situ spectroscopic analysis, isotopic labeling characterization and ultramicroelectrode voltammetric measurement reveal the total enhancement in electrochemical CO2 reduction capability on BiNSs could be mainly attributed to the magnetic field facilitated spin evolution process along with the magnetohydrodynamic effect. The contribution of spin evolution process and mass transport to the current enhancement indicates the CO2 reduction reaction process can be modulated by kinetic in the further.