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Ferrites boosting photocatalytic hydrogen evolution over graphitic carbon nitride: a case study of(Co, Ni)Fe_2O_4 modification 被引量:10

Ferrites boosting photocatalytic hydrogen evolution over graphitic carbon nitride: a case study of(Co, Ni)Fe_2O_4 modification
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摘要 The charge cartier separation and surface catalytic redox reactions are of primary importance as elementary steps in photocatalytic hydrogen evolution. In this study, both of these two processes in photocatalytic hydrogen evolution over graphitic carbon nitride (g-C3N4) were greatly promoted with the earth-abundant ferrites (Co, Ni)Fe2O4 modification. CoFe2O4 was further demonstrated to be a better modifier for g-C3N4 as compared to NiFe2O4, due to the more efficient charge carrier transfer as well as superior surface oxidative catalytic activity. When together loading CoFe2O4 and reductive hydrogen production electrocatalyst Pt onto g-C3N4, the obtained Pt/g-C3N4/CoFe2O4 photocatalyst achieved visible-light (2 〉 420 nm) hydrogen production rate 3.5 times as high as Pt/g-C3N4, with the apparent quantum yield reaching 3.35 % at 420 nm. The charge carrier separation and surface catalytic redox reactions are of primary importance as elementary steps in photocatalytic hydrogen evolution. In this study, both of these two processes in photocatalytic hydrogen evolution over graphitic carbon nitride(g-C_3N_4) were greatly promoted with the earth-abundant ferrites(Co,Ni)Fe_2O_4modification. Co Fe_2O_4 was further demonstrated to be a better modifier for g-C_3N_4 as compared to Ni Fe_2O_4,due to the more efficient charge carrier transfer as well as superior surface oxidative catalytic activity. When together loading Co Fe_2O_4 and reductive hydrogen production electrocatalyst Pt onto g-C_3N_4, the obtained Pt/g-C_3N_4/Co Fe_2O_4 photocatalyst achieved visible-light(λ>420 nm) hydrogen production rate 3.5 times as high as Pt/g-C_3N_4, with the apparent quantum yield reaching 3.35 % at 420 nm.
出处 《Science Bulletin》 SCIE EI CAS CSCD 2016年第4期292-301,共10页 科学通报(英文版)
基金 the National Natural Science Foundation of China (51323011 and 51236007) the Program for New Century Excellent Talents in University (NCET-130455) the Natural Science Foundation of Shaanxi Province (2014KW07-02) the Natural Science Foundation of Jiangsu Province (BK20141212) the Nano Research Program of Suzhou City (ZXG201442 and ZXG2013003) the Foundation for the Author of National Excellent Doctoral Dissertation of China (201335) the Fundamental Research Funds for the Central Universities
关键词 Graphitic carbon nitride FerritesPhotocatalytic water splitting Solar hydrogenconversion CoFe2O4 NiFe2O4 催化析氢 铁氧体 改性剂 氮化碳 石墨相 氧化还原反应
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