Surface & Interface Modeling
for Emerging Nanomaterials and Devices

Photochemical Carbon Dioxide Reduction on Mg-Doped Ga(In)N Nanowire Arrays under Visible Light Irradiation

B. AlOtaibi†, X. Kong‡§, S. Vanka†, S. Y. Woo∥, A. Pofelski∥, F. Oudjedi‡, S. Fan†, M. G. Kibria†∥, G. A. Botton∥, W. Ji§, H. Guo‡, and Z. Mi*†

 Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 0E9, Canada
 Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada
§ Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices,Renmin University of China, Beijing 100872, China
 Department of Materials Science and Engineering, Canadian Centre for Electron Microscopy, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada

DOI:10.1021/acsenergylett.6b00119    Publication Date: June 08, 2016


The photochemical reduction of carbon dioxide (CO2) into energy-rich products can potentially address some of the critical challenges we face today, including energy resource shortages and greenhouse gas emissions. Our ab initio calculations show that CO2 molecules can be spontaneously activated on the clean nonpolar surfaces of wurtzite metal nitrides, for example, Ga(In)N. We have further demonstrated the photoreduction of CO2 into methanol (CH3OH) with sunlight as the only energy input. A conversion rate of CO2 into CH3OH (∼0.5 mmol gcat–1 h–1) is achieved under visible light illumination (>400 nm). Moreover, we have discovered that the photocatalytic activity for CO


View: ACS Energy Lett.  1, 246-252 (2016)    

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