刘一鸣, 苗静静, 张王刚, 卫爱丽, 王剑. CdS上原位光沉积助催化剂Ni2P用于光催化转化乙醇协同产氢[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60493-7
引用本文: 刘一鸣, 苗静静, 张王刚, 卫爱丽, 王剑. CdS上原位光沉积助催化剂Ni2P用于光催化转化乙醇协同产氢[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60493-7
LIU Yiming, MIAO Jingjing, ZHANG Wanggang, WEI Aili, WANG Jian. In-situ photodeposition of co-catalyst Ni2P on CdS for photocatalytic conversion of ethanol for synergistic hydrogen production[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60493-7
Citation: LIU Yiming, MIAO Jingjing, ZHANG Wanggang, WEI Aili, WANG Jian. In-situ photodeposition of co-catalyst Ni2P on CdS for photocatalytic conversion of ethanol for synergistic hydrogen production[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60493-7

CdS上原位光沉积助催化剂Ni2P用于光催化转化乙醇协同产氢

In-situ photodeposition of co-catalyst Ni2P on CdS for photocatalytic conversion of ethanol for synergistic hydrogen production

  • 摘要: 利用光催化技术将乙醇转化为高附加值产物的同时促进氢气的产生为绿色和可持续发展开辟了新的道路。本文采用简单的原位光沉积法,在一维网络CdS上沉积非贵金属助催化剂Ni2P,从而构建了Ni2P/CdS复合材料。所制备的光催化剂能够促进乙醇分解成高附加值产品同时产生氢气。负载Ni2P助催化剂后的复合光阳极在可见光区的乙醇转化率和产氢率显著提高,几乎是纯CdS的三倍。且光催化乙醇的主要产物为乙醛以及2,3-丁二醇,与CdS相比复合光阳极将乙醇转化为乙醛的选择性有了显著提高(62%至78%)。对制备的光催化剂进行的各种表征证实,在CdS上负载Ni2P助催化剂不仅拓宽了催化剂捕获光的光学区域,还有效促进了电荷载流子的分离和转移,从而显著提高了催化剂中乙醇转化和制氢的光催化效率。通过电子顺磁共振测试证明,在CdS上负载Ni2P助催化剂有利于羟乙基自由基(*CH(OH)CH3)的吸附,从而进一步提高乙醛的选择性。本研究对合理设计复合催化剂结构和引入助催化剂以提高催化剂性能,推进绿色化学发展,倡导低碳社会,促进可持续发展具有重要作用。

     

    Abstract: The use of photocatalysis to convert ethanol into high-value-added products while promoting hydrogen generation opens new avenues for green and sustainable development. In this study, Ni2P/CdS composites were constructed by depositing non-precious metal co-catalyst Ni2P on a one-dimensional network of CdS using a simple in situ photodeposition method. The prepared photocatalysts promoted the decomposition of ethanol into high-value-added products while generating hydrogen. The composite photoanodes loaded with the Ni2P co-catalysts showed significantly higher ethanol conversion and hydrogen production in the visible light region, which was almost three times higher than that of pure CdS. The main products of photocatalytic ethanol production are acetaldehyde(AA) and 2,3-butanediol(2,3-BDA). Compared with CdS, the selectivity of the composite photocatalysts for converting ethanol to acetaldehyde was significantly improved (62% to 78%). Characterization of the prepared photocatalysts confirmed that the loading of Ni2P co-catalysts on CdS not only broadened the optical region of the catalysts for trapping light but also effectively promoted the separation and transfer of charge carriers, which significantly improved the photocatalytic efficiency of ethanol conversion and hydrogen production in the catalysts. It has been proven through Electron Paramagnetic Resonance testing that loading a Ni2P co-catalyst on CdS is beneficial for the adsorption of hydroxyethyl radicals (*CH(OH)CH3), thereby further improving the selectivity of acetaldehyde. This study plays an important role in the rational design of composite catalyst structures and the introduction of co-catalysts to improve catalyst performance, promote green chemistry, advocate a low-carbon society, and promote sustainable development.

     

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