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Amorphous‐crystalline Co−B−P Catalyst for Synergistically Enhanced Hydrogen Evolution Reaction
ChemCatChem ( IF 3.8 ) Pub Date : 2020-09-23 , DOI: 10.1002/cctc.202001343 Xinghong Bao 1 , Yuting Li 1 , Juan Wang 2 , Qin Zhong 1
ChemCatChem ( IF 3.8 ) Pub Date : 2020-09-23 , DOI: 10.1002/cctc.202001343 Xinghong Bao 1 , Yuting Li 1 , Juan Wang 2 , Qin Zhong 1
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The development of highly practical and stable catalysts for hydrogen evolution reaction (HER) remains challenging to accomplish continuous H2 production through water electrolysis. In this work, the porous network Co−B−P amorphous‐crystalline catalyst was synthesized through a hydrothermal‐alternating immersion boronization‐phosphidation pathway. The Co−B−P nanocomposite consists of the amorphous Co−B−O and crystalline Co2P2O7 compositions. The Co−B−P catalyst shows highly effective HER electrochemical performance with low overpotential of 51 mV at current density of 10 mA cm−2 and Tafel slope of 44 mV dec−1 in alkaline solution (pH=14). After 1000 cycles of CV scanning, the catalyst shows no significant reduction in HER performance. Such superior HER performance can be ascribed to (1) the amorphous Co−B−O structure accelerating charge transfer between active sites and intermediates and (2) the formed P−O bonds of crystalline Co2P2O7 promoting the dissociation course of water molecules. The combination of crystalline and amorphous substances provides prospects for the design of HER catalyst structures in the future.
中文翻译：
协同增强产氢反应的非晶态Co-B-P催化剂
用于氢析出反应（HER）的高度实用和稳定的催化剂的开发对于通过水电解实现连续的H 2产生仍然具有挑战性。在这项工作中，通过水热交替浸没硼化磷化途径合成了多孔网络Co-B-P非晶态催化剂。Co-B-P纳米复合材料由非晶Co-B-O和结晶Co 2 P 2 O 7组成。Co-B-P催化剂显示出高效的HER电化学性能，在10 mA cm -2的电流密度和44 mV dec -1的Tafel斜率下具有51 mV的低过电势在碱性溶液（pH = 14）中。在进行CV扫描1000次循环后，催化剂的HER性能没有明显降低。如此优异的HER性能可归因于（1）非晶态的Co-B-O结构加速了活性位点和中间体之间的电荷转移，以及（2）结晶的Co 2 P 2 O 7形成的P-O键促进了Cb的解离过程。水分子。晶体和无定形物质的结合为将来HER催化剂结构的设计提供了前景。
更新日期：2020-09-23
中文翻译：
协同增强产氢反应的非晶态Co-B-P催化剂
用于氢析出反应（HER）的高度实用和稳定的催化剂的开发对于通过水电解实现连续的H 2产生仍然具有挑战性。在这项工作中，通过水热交替浸没硼化磷化途径合成了多孔网络Co-B-P非晶态催化剂。Co-B-P纳米复合材料由非晶Co-B-O和结晶Co 2 P 2 O 7组成。Co-B-P催化剂显示出高效的HER电化学性能，在10 mA cm -2的电流密度和44 mV dec -1的Tafel斜率下具有51 mV的低过电势在碱性溶液（pH = 14）中。在进行CV扫描1000次循环后，催化剂的HER性能没有明显降低。如此优异的HER性能可归因于（1）非晶态的Co-B-O结构加速了活性位点和中间体之间的电荷转移，以及（2）结晶的Co 2 P 2 O 7形成的P-O键促进了Cb的解离过程。水分子。晶体和无定形物质的结合为将来HER催化剂结构的设计提供了前景。
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