材料科学
光电化学电池
能量转换效率
分解水
纳米孔
氢燃料
制氢
酒石酸
电化学能量转换
化学能
能量转换
化学工程
纳米技术
燃料电池
电极
氢
电化学
光催化
光电子学
催化作用
有机化学
化学
电解质
工程类
物理化学
物理
热力学
柠檬酸
作者
Zhaoqi Wang,Yuhao Guo,Lan Mu,Xiaolei Liu,Haipeng Zhang,Weiyi Jiang,Peng Wang,Zhaoke Zheng,Yuanyuan Liu,Hefeng Cheng,Ying Dai,Zeyan Wang,Baibiao Huang
标识
DOI:10.1002/adma.202201594
摘要
Utilizing a photoelectrochemical (PEC) fuel cell to replace difficult water oxidation with facile oxidation of organic wastes is regarded as an effective method to improve the H2 production efficiency. However, in most reported PEC fuel cells, their PEC activities are still low and the energy in organic fuels cannot be effectively utilized. Here, a unique BiVO4 PEC fuel cell is successfully developed by utilizing the low-cost biomass, tartaric acid, as an organic fuel. Thanks to the strong complexation between BiVO4 and tartaric acid, a bridge for the charge and energy transfer is successfully constructed, which not only improves the photoelectric conversion efficiency of BiVO4 , but also effectively converts the chemical energy of biomass into H2 . Remarkably, under AM1.5G illumination, the optimal nanoporous BiVO4 photoanode exhibits a high current density of 13.54 mA cm-2 at 1.23 V vs reversible hydrogen electrode (RHE) for H2 production, which is higher than that of previously reported PEC water splitting systems or PEC fuel cell systems. This work opens a new path for solving the low PEC H2 production efficiency and provides a new idea for improving the performances and energy conversion efficiency in traditional PEC fuel cells.
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