排序方式: 共有3条查询结果,搜索用时 15 毫秒
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Haojie Zhang Dr. Dirk J. Hagen Prof. Xiaopeng Li Dr. Andreas Graff Dr. Frank Heyroth Dr. Bodo Fuhrmann Dr. Ilya Kostanovskiy Dr. Stefan L. Schweizer Dr. Francesco Caddeo Prof. A. Wouter Maijenburg Prof. Stuart Parkin Prof. Ralf B. Wehrspohn 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(39):17324-17329
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Dr. Sheng Yang Guangbo Chen Dr. Antonio Gaetano Ricciardulli Dr. Panpan Zhang Dr. Zhen Zhang Huanhuan Shi Ji Ma Dr. Jian Zhang Prof. Paul W. M. Blom Prof. Xinliang Feng 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(1):473-478
Transition-metal phosphides (TMPs) have emerged as a fascinating class of narrow-gap semiconductors and electrocatalysts. However, they are intrinsic nonlayered materials that cannot be delaminated into two-dimensional (2D) sheets. Here, we demonstrate a general bottom-up topochemical strategy to synthesize a series of 2D TMPs (e.g. Co2P, Ni12P5, and CoxFe2−xP) by using phosphorene sheets as the phosphorus precursors and 2D templates. Notably, 2D Co2P is a p-type semiconductor, with a hole mobility of 20.8 cm2 V−1 s−1 at 300 K in field-effect transistors. It also behaves as a promising electrocatalyst for the oxygen evolution reaction (OER), thanks to the charge-transport modulation and improved surface exposure. In particular, iron-doped Co2P (i.e. Co1.5Fe0.5P) delivers a low overpotential of only 278 mV at a current density of 10 mA cm−2 that outperforms the commercial Ir/C benchmark (304 mV). 相似文献
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Teng Liu Peng Li Na Yao Gongzhen Cheng Shengli Chen Wei Luo Yadong Yin 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(14):4727-4732
Although electrocatalysts based on transition metal phosphides (TMPs) with cationic/anionic doping have been widely studied for hydrogen evolution reaction (HER), the origin of performance enhancement still remains elusive mainly due to the random dispersion of dopants. Herein, we report a controllable partial phosphorization strategy to generate CoP species within the Co‐based metal‐organic framework (Co‐MOF). Density functional theory calculations and experimental results reveal that the electron transfer from CoP to Co‐MOF through N‐P/N‐Co bonds could lead to the optimized adsorption energy of H2O (ΔG ) and hydrogen (ΔGH*), which, together with the unique porous structure of Co‐MOF, contributes to the remarkable HER performance with an overpotential of 49 mV at a current density of 10 mA cm?2 in 1 m phosphate buffer solution (PBS, pH 7.0). The excellent catalytic performance exceeds almost all the documented TMP‐based and non‐noble‐metal‐based electrocatalysts. In addition, the CoP/Co‐MOF hybrid also displays Pt‐like performance in 0.5 m H2SO4 and 1 m KOH, with the overpotentials of 27 and 34 mV, respectively, at a current density of 10 mA cm?2. 相似文献
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