具有100小时稳定性的纳米结构金电极用于太阳能驱动的二氧化碳电化学还原为一氧化碳
Nanostructured Au Electrode with 100 h Stability for Solar-Driven Electrochemical Reduction of Carbon Dioxide to Carbon Monoxide.
作者信息
Bae Hyojung, Seong Chaewon, Burungale Vishal, Seol Myeongheon, Yoon Chul Oh, Kang Soon Hyung, Jung Wan-Gil, Kim Bong-Joong, Ha Jun-Seok
机构信息
Optoelectronics Convergence Research Center, Chonnam National University, 77 Yongbong-ro, Gwangju 61186, Korea.
School of Chemical Engineering, Chonnam National University, 77 Yongbong-ro, Gwangju 61186, Korea.
出版信息
ACS Omega. 2022 Feb 28;7(11):9422-9429. doi: 10.1021/acsomega.1c06720. eCollection 2022 Mar 22.
Solar-to-chemical energy conversion is a potential alternative to fossil fuels. A promising approach is the electrochemical (EC) reduction of CO to value-added chemicals, particularly hydrocarbons. Here, we report on the selective EC reduction of CO to CO on a porous Au nanostructure (pAu) cathode in 0.1 M KHCO. The pAu cathode anodized at 2.6 V exhibited maximum Faradaic efficiency (FE) for conversion of CO to CO (up to 100% at -0.75 V vs reversible hydrogen electrode (RHE)). Furthermore, commercial Si photovoltaic cells were combined with EC systems (PV-EC) consisting of pAu cathodes and IrO anodes. The triple-junction cell and EC system resulted in a solar-to-CO conversion efficiency (SCE) of 5.3% under 1 sun illumination and was operated for 100 h. This study provides a PV-EC CO reduction system for CO production and indicates the potential of the PV-EC system for the EC reduction of CO to value-added chemicals.
太阳能到化学能的转化是化石燃料的一种潜在替代方案。一种有前景的方法是将CO电化学（EC）还原为增值化学品，特别是碳氢化合物。在此，我们报道了在0.1 M KHCO中，多孔金纳米结构（pAu）阴极上CO选择性电化学还原为CO的情况。在2.6 V下阳极氧化的pAu阴极在将CO转化为CO时表现出最大法拉第效率（FE）（相对于可逆氢电极（RHE），在-0.75 V时高达100%）。此外，商用硅光伏电池与由pAu阴极和IrO阳极组成的EC系统（PV-EC）相结合。三结电池和EC系统在1个太阳光照下的太阳能到CO的转化效率（SCE）为5.3%，并运行了100小时。本研究提供了一种用于CO生产的PV-EC CO还原系统，并表明了PV-EC系统将CO电化学还原为增值化学品的潜力。
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