共查询到20条相似文献,搜索用时 15 毫秒
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Identifying the Key Role of Pyridinic‐N–Co Bonding in Synergistic Electrocatalysis for Reversible ORR/OER 下载免费PDF全文
Xue‐Rui Wang Jie‐Yu Liu Zi‐Wei Liu Wei‐Chao Wang Jun Luo Xiao‐Peng Han Xi‐Wen Du Shi‐Zhang Qiao Jing Yang 《Advanced materials (Deerfield Beach, Fla.)》2018,30(23)
For many regenerative electrochemical energy‐conversion systems, hybrid electrocatalysts comprising transition metal (TM) oxides and heteroatom‐doped (e.g., nitrogen‐doped) carbonaceous materials are promising bifunctional oxygen reduction reaction/oxygen evolution reaction electrocatalysts, whose enhanced electrocatalytic activities are attributed to the synergistic effect originated from the TM–N–C active sites. However, it is still ambiguous which configuration of nitrogen dopants, either pyridinic or pyrrolic N, when bonded to the TM in oxides, predominately contributes to the synergistic effect. Herein, an innovative strategy based on laser irradiation is described to controllably tune the relative concentrations of pyridinic and pyrrolic nitrogen dopants in the hybrid catalyst, i.e., NiCo2O4 NPs/N‐doped mesoporous graphene. Comparative studies reveal the dominant role of pyridinic‐N? Co bonding, instead of pyrrolic‐N bonding, in synergistically promoting reversible oxygen electrocatalysis. Moreover, density functional theory calculations provide deep insights into the corresponding synergistic mechanism. The optimized hybrid, NiCo/NLG‐270, manifests outstanding reversible oxygen electrocatalytic activities, leading to an overpotential different ΔE among the lowest value for highly efficient bifunctional catalysts. In a practical reversible Zn–air battery, NiCo/NLG‐270 exhibits superior charge/discharge performance and long‐term durability compared to the noble metal electrocatalysts. 相似文献
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《Advanced materials (Deerfield Beach, Fla.)》2010,22(23):2479-2484
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Oxygen Electrocatalysis: Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis (Adv. Mater. 32/2016) 下载免费PDF全文
Cheng Tang Hao‐Fan Wang Xiang Chen Bo‐Quan Li Ting‐Zheng Hou Bingsen Zhang Qiang Zhang Maria‐Magdalena Titirici Fei Wei 《Advanced materials (Deerfield Beach, Fla.)》2016,28(32):7030-7030
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Nanogenerators: Transparent Flexible Graphene Triboelectric Nanogenerators (Adv. Mater. 23/2014) 下载免费PDF全文
Seongsu Kim Manoj Kumar Gupta Keun Young Lee Ahrum Sohn Tae Yun Kim Kyung‐Sik Shin Dohwan Kim Sung Kyun Kim Kang Hyuck Lee Hyeon‐Jin Shin Dong‐Wook Kim Sang‐Woo Kim 《Advanced materials (Deerfield Beach, Fla.)》2014,26(23):3778-3778
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Semiconductors: A Unique Semiconductor–Metal–Graphene Stack Design to Harness Charge Flow for Photocatalysis (Adv. Mater. 32/2014) 下载免费PDF全文
Song Bai Jing Ge Lili Wang Ming Gong Mingsen Deng Qiao Kong Li Song Jun Jiang Qun Zhang Yi Luo Yi Xie Yujie Xiong 《Advanced materials (Deerfield Beach, Fla.)》2014,26(32):5578-5578
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Zinc–Air Batteries: Atomically Thin Mesoporous Co3O4 Layers Strongly Coupled with N‐rGO Nanosheets as High‐Performance Bifunctional Catalysts for 1D Knittable Zinc–Air Batteries (Adv. Mater. 4/2018) 下载免费PDF全文
Yingbo Li Cheng Zhong Jie Liu Xiaoqiao Zeng Shengxiang Qu Xiaopeng Han Yida Deng Wenbin Hu Jun Lu 《Advanced materials (Deerfield Beach, Fla.)》2018,30(4)