催化作用
化学
密度泛函理论
Atom(片上系统)
对偶(语法数字)
电子结构
金属
Boosting(机器学习)
材料科学
结晶学
计算化学
冶金
计算机科学
有机化学
嵌入式系统
艺术
文学类
机器学习
作者
Yun‐Nan Gong,Chang-Yu Cao,Wenjie Shi,Jihong Zhang,Jing Deng,Tong‐Bu Lu,Di‐Chang Zhong
标识
DOI:10.1002/anie.202215187
摘要
Abstract Dual‐atom catalysts (DACs) have emerged as efficient electrocatalysts for CO 2 reduction owing to the synergistic effect between the binary metal sites. However, rationally modulating the electronic structure of DACs to optimize the catalytic performance remains a great challenge. Herein, we report the electronic structure modulation of three Ni 2 DACs (namely, Ni 2 −N 7 , Ni 2 −N 5 C 2 and Ni 2 −N 3 C 4 ) by the regulation of the coordination environments around the dual‐atom Ni 2 centres. As a result, Ni 2 −N 3 C 4 exhibits significantly improved electrocatalytic activity for CO 2 reduction, not only better than the corresponding single‐atom Ni catalyst (Ni−N 2 C 2 ), but also higher than Ni 2 −N 7 and Ni 2 −N 5 C 2 DACs. Density functional theory (DFT) calculations revealed that the high electrocatalytic activity of Ni 2 −N 3 C 4 for CO 2 reduction could be attributed to the electronic structure modulation to the Ni centre and the resulted proper binding energies to COOH* and CO* intermediates.
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