Photoelectrochemical reduction of carbon dioxide using Ge doped GaN nanowire photoanodes

Yichen Wang,Faqrul A Chowdhury,Bandar Alotaibi,Lu Li,Md G Kibria,Shizhao Fan,Chao-Jun Li,Zetian Mi

doi:10.1063/1.4935307

Abstract

We report on the direct conversion of carbon dioxide (CO2) in a photoelectrochemical cell consisting of germanium doped gallium nitride nanowire anode and copper (Cu) cathode. Various products including methane (CH4), carbon monoxide (CO), and formic acid (HCOOH) were observed under light illumination. A Faradaic efficiency of ∼10% was measured for HCOOH. Furthermore, this photoelectrochemical system showed enhanced stability for 6 h CO2 reduction reaction on low cost, large area Si substrates.

Highlights

We report on the direct conversion of carbon dioxide (CO2) in a photoelectrochemical cell consisting of germanium doped gallium nitride nanowire anode and copper (Cu) cathode
A Faradaic efficiency of ∼10% was measured for HCOOH
Yotsuhashi et al showed the promising potential of GaN for CO2 reduction,[23,24,25,26] wherein GaN epilayers grown on sapphire or GaN substrate were used as photoanodes

Summary

Introduction

We report on the direct conversion of carbon dioxide (CO2) in a photoelectrochemical cell consisting of germanium doped gallium nitride nanowire anode and copper (Cu) cathode. Photoelectrochemical reduction of carbon dioxide using Ge doped GaN nanowire photoanodes Photoelectrochemical reduction of carbon dioxide using Ge doped GaN nanowire photoanodes Yichen Wang,[1] Bandar AlOtaibi,[1] Faqrul A.

Results

Conclusion