Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction

Song Jun Tae; Ryoo Hyewon; Cho Minhyung; Kim Jaehoon; Kim Jin-Gyu; Chung Sung-Yoon; Oh Jihun

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Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction

机译：Si光电极上的纳米多孔Au薄膜，用于选择性和高效的光电化学CO2还原

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摘要

An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96% at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh-type co-catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91% Faradaic efficiency at positive potential than the CO2/CO equilibrium potential.

机译：提出了一种具有纳米孔金薄膜的硅光电极，用于高选择性和高效的光电化学（PEC）CO2还原反应（CO2RR）。通过阳极氧化的Au薄膜的电化学还原形成纳米多孔Au薄膜。 Au薄膜的电化学处理可显着提高Au催化剂的CO2还原催化活性，并在480 mV过电势下表现出96％的CO法拉第效率。为了将Au膜进行电化学预处理以用于PEC CO2RR，展示了一种新型的Si光电极设计，其网状助催化剂独立地连接在光电极的正面和背面。由于纳米孔金网具有出色的CO2RR活性和来自Si的高光电压，具有纳米孔金薄膜网的Si光电极在正电势下比CO2 / CO平衡电势以91％的法拉第效率将CO2转化为CO。

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来源
《Advanced energy materials》 |2017年第3期|1601103.1-1601103.8|共8页
作者
Song Jun Tae; Ryoo Hyewon; Cho Minhyung; Kim Jaehoon; Kim Jin-Gyu; Chung Sung-Yoon; Oh Jihun;
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Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea|Korea Adv Inst Sci & Technol, KAIST Inst NanoCentury, 291 Daehak Ro, Daejeon 34141, South Korea;

Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea;

Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea;

Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea;

Korea Basic Sci Inst, 169-148 Gwahak Ro, Daejeon 34133, South Korea;

Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea|Korea Adv Inst Sci & Technol, KAIST Inst NanoCentury, 291 Daehak Ro, Daejeon 34141, South Korea;

Korea Adv Inst Sci & Technol, Grad Sch Energy Environm Water & Sustainabil, 291 Daehak Ro, Daejeon 34141, South Korea|Korea Adv Inst Sci & Technol, KAIST Inst NanoCentury, 291 Daehak Ro, Daejeon 34141, South Korea;

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CO2 conversion; nanoporous Au thin film catalysts; photoelectrochemical (PEC) CO2 reduction; Si photoelectrodes;

机译：二氧化碳转化纳米孔金薄膜催化剂光电化学还原二氧化碳硅光电电极;

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机译：在纳米线光电极上原位生长ZIF-67衍生的双功能CoP和CoN多孔纳米催化剂，用于有效的光电化学水分解和CO2还原
2. Bifunctional CoP and CoN porous nanocatalysts derived from ZIF-67 in situ grown on nanowire photoelectrodes for efficient photoelectrochemical water splitting and CO2 reduction [J] . Weng Baicheng, Wei Wei, Yiliguma, Journal of Materials Chemistry, A. Materials for energy and sustainability . 2016,第40期

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3. Electrochemical CO2 Reduction Over Bimetallic Au-Sn Thin Films: Comparing Activity and Selectivity against Morphological, Compositional, and Electronic Differences [J] . Chandrashekar Sanjana, Nesbitt Nathan T., Smith Wilson A. The journal of physical chemistry, C. Nanomaterials and interfaces . 2020,第27期

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4. a-SiC:H Films used as Photoelectrodes in a Hybrid, Thin-film Silicon Photoelectrochemical (PEC) Cell for progress toward 10 Solar-to Hydrogen Efficiency [C] . Feng Zhu, Jian Hu, Augusto Kunrath, Solar Hydrogen and Nanotechnology II; Proceedings of SPIE-The International Society for Optical Engineering; vol.6650 . 2007

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5. First Principles Insights into the Mechanism of Pyridine-Catalyzed CO2 Reduction on p-GaP Photoelectrodes [D] . Lessio, Martina. 2017

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机译：电子效果决定了平面的选择性用于电化学还原CO2的Au-Cu双金属薄膜
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Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction

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