Enhancement of Photoelectrochemical Reduction by LaFeO3 Photocathodes Coated with Electroless Deposited Nickel Boride Catalyst
Enhancement of Photoelectrochemical Reduction by LaFeO3 Photocathodes Coated with Electroless Deposited Nickel Boride Catalyst
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化学镀硼化镍催化剂涂层 LaFeO3 光阴极增强光电化学还原
DOI：
10.1007/s10562-019-03002-3
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发表时间：
2019-10
影响因子：
2.8
通讯作者：
Cao Dawei
中科院分区：
文献类型：
--
作者：
Wang Peipei;Xing Jiali;He Yanfang;Liu Yuan;Yang Ying;Chen Mingming;Cao Dawei
人们一直在努力提高LaFeO 3的光电化学性能。然而，用过渡金属硼化物修饰LaFeO_3以提高其光电化学活性的报道很少。在此，我们通过将LFO浸渍到所制备的化学镀液中来制备LFO/Ni-B复合电极。优化后的LFO/Ni-B复合材料的光电流密度提高了373%，起始电位发生了阳极偏移。系统的研究表明，PEC活性的改善应归因于增强的电化学活性表面积和电催化性能，降低PEC系统的电阻，以及在光电极/电解质界面处更明显的向下能带弯曲。
Great efforts have been paid to enhance the photoelectrochemical performances of LaFeO3. However, there have rarely been reported about modifying of LaFeO3 with transitional metal borides for enhanced photoelectrochemical activities. Herein, we prepared LFO/Ni–B composite electrodes by immersing LFO into the prepared electroless plating solution. The optimized LFO/Ni–B composite exhibits a 373% improvement of the photocurrent density and exhibits an anodic shift of onset potential. Systematic studies reveal that the improvement of PEC activity should be attributed to enhanced electrochemically active surface area and electrocatalytic properties, reduced resistance of the PEC system, and a more pronounced downward band bending at the photoelectrode/electrolyte interface.
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