异质结
纳米点
材料科学
催化作用
石墨氮化碳
电化学
氧化物
氧化还原
格式化
纳米技术
光电子学
化学
光催化
电极
物理化学
冶金
生物化学
作者
Qian Zhang,Mingzi Sun,Chen-Yue Yuan,Qiwen Sun,Bolong Huang,Hao Dong,Yawen Zhang
标识
DOI:10.1021/acscatal.3c00688
摘要
Constructing abundant surface/interface structures has significant impacts on improving the performance of electrochemical CO2 reduction reaction (CO2RR) catalysts. For developing high-performance CO2RR catalysts, herein we report a 0D/2D heterojunction structure of SnO2 nanodots (∼2 nm) confined on graphitic carbon nitride (g-C3N4) nanosheets for promoting the conversion of CO2 to formate. Experimental and theoretical studies demonstrate that the abundant N-coordinating sites of g-C3N4 and highly distributed SnO2 nanodots synergistically lead to strong metal oxide–support interactions, and the substantial heterojunction interface in SnO2/g-C3N4 has induced efficient electron transfer from electron-rich g-C3N4 to SnO2 mainly through p–p orbital couplings. As a result, the SnO2/g-C3N4 heterojunction provides superior activity and stability for the conversion of CO2RR to formate, with a Faradic efficiency of 91.7% at −0.88 V vs RHE. Moreover, the proposed 0D/2D heterojunction strategy was extended to In2O3/g-C3N4, supplying a universal strategy to achieve efficient hybrid catalysts for CO2RR in the production of high-value chemicals.
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