Cu-石墨炔/双金属钨酸盐S型异质结协同增强光催化析氢  

Synergistic Effect of Cu-Graphdiyne/Transition Bimetallic Tungstate Formed S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

作　　者：周正宇 姚惠琴 吴有林 李腾 椿范立 靳治良[1] Zhengyu Zhou;Huiqin Yao;Youlin Wu;Teng Li;Noritatsu Tsubaki;Zhiliang Jin(School of Chemistry and Chemical Engineering,North Minzu University,Yinchuan 750021,China;Department of Chemistry,College of Basic Medicine,Ningxia Medical University,Yinchuan 750004,China;Department of Applied Chemistry,Graduate School of Engineering,University of Toyama,Gofuku 3190,Toyama 930-8555,Japan)

机构地区：[1]北方民族大学化学与化学工程学院,银川750021 [2]宁夏医科大学基础医学院化学系,银川750004 [3]Department of Applied Chemistry,Graduate School of Engineering,University of Toyama,Gofuku 3190,Toyama 930-8555,Japan

出　　处：《物理化学学报》2024年第10期52-54,共3页Acta Physico-Chimica Sinica

基　　金：宁夏回族自治区自然科学基金(2023AAC02046)资助。

摘　　要：采用有机法和水热法合成了Cu-石墨炔和CoNiWO_(4)并构建Cu-石墨炔/CoNiWO_(4)S型异质结。在保留催化剂强氧化还原能力的同时,通过内建电场和能带弯曲的协同作用促进了光生载流子的高效分离和转移。Cu-石墨炔的引入有效提高了复合催化剂的光吸收能力和导电性,抑制了光生载流子的复合。同时,Cu-石墨炔独特的二维平面网络结构提供了丰富的活性位点,从而促进了光催化反应的进行。密度泛函理论(DFT)计算表明,Cu的表面等离子体共振效应产生的热电子转移到石墨炔上,促进氢气的析出。本研究为Cu-石墨炔和镍钴基催化剂在光催化制氢领域提供了新的参考。Cu-Graphdiyne and CoNiWO_(4)were synthesized by organic and hydrothermal methods,respectively.The establishment of an S-scheme heterojunction between Cu-Graphdiyne and CoNiWO_(4)was achieved by interface engineering design.The efficient separation and transfer of photogenerated carriers are facilitated by the synergistic effect of the built-in electric field and band bending,while maintaining the strong redox capacity of the catalysts.The introduction of Cu-Graphdiyne effectively enhances the photo absorption capacity and conductivity of the composite catalyst,and significantly suppresses the recombination of photogenerated carriers.The unique two-dimensional planar network structure of Cu-Graphdiyne provides abundant active sites for photocatalytic processes,thereby facilitating the photocatalytic reaction.Density functional theory(DFT)calculations demonstrate that hot electrons generated by surface plasmon resonance effects of Cu will transfer to Graphdiyne to promote hydrogen evolution reaction.This study offers insights into potential applications of Cu-Graphdiyne and nickel-cobalt based catalysts in photocatalytic hydrogen evolution.

关 键 词：Cu-石墨炔 S-型异质结 界面工程设计 析氢反应 DFT 

分 类 号：O643[理学—物理化学]