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Chengyu Xing Yurui Xue Bolong Huang Huidi Yu Lan Hui Yan Fang Yuxin Liu Yingjie Zhao Zhibo Li Yuliang Li 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(39):14035-14041
A highly efficient bifunctional metal‐free catalyst was prepared by growth of three‐dimensional porous fluorographdiyne networks on carbon cloth (p‐FGDY/CC). Our experiments and density functional theory (DFT) calculations show the 3D p‐FGDY/CC network is highly active and it is a high potential metal‐free catalyst for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as overall water splitting (OWS) under both acidic and alkaline conditions. The experimental and theoretical results show very good consistency; for example, in the HER process, p‐FGDY/CC exhibits small overpotentials of 82 and 92 mV to achieve 10 mA cm?2 under alkaline and acidic conditions, respectively. This ensures an even higher selectivity for the adsorption/desorption of various O/H intermediate species. The essential key promotion accomplishes a bifunctional H2O redox performance application under pH‐universal electrochemical conditions. 相似文献
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Fulai Liu Rui Shi Zhuan Wang Yuxiang Weng Chi‐Ming Che Yong Chen 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(34):11917-11921
Black phosphorus (BP) has recently drawn attention in photocatalysis for its optical properties. However, limited by the rapid recombination of photogenerated carriers, the use of BP for photocatalytic water splitting still remains a huge challenge. Herein, we prepare a black/red phosphorus (BP/RP) hetero‐phase junction photocatalyst by a wet‐chemistry method to promote the interfacial charge separation and thus achieve Z‐scheme photocatalytic water splitting without using sacrificial agents. The Z‐scheme mechanism was confirmed by time‐resolved transient absorption spectroscopy. This work provides a novel insight into the interface design of hetero‐phase junction with atomic precision. 相似文献
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Qing Yao Bolong Huang Nan Zhang Mingzi Sun Qi Shao Xiaoqing Huang 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(39):14121-14126
Channel‐rich RuCu snowflake‐like nanosheets (NSs) composed of crystallized Ru and amorphous Cu were used as efficient electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting in pH‐universal electrolytes. The optimized RuCu NSs/C‐350 °C and RuCu NSs/C‐250 °C show attractive activities of OER and HER with low overpotentials and small Tafel slopes, respectively. When applied to overall water splitting, the optimized RuCu NSs/C can reach 10 mA cm?2 at cell voltages of only 1.49, 1.55, 1.49 and 1.50 V in 1 m KOH, 0.1 m KOH, 0.5 m H2SO4 and 0.05 m H2SO4, respectively, much lower than those of commercial Ir/C∥Pt/C. The optimized electrolyzer exhibits superior durability with small potential change after up to 45 h in 1 m KOH, showing a class of efficient functional electrocatalysts for overall water splitting. 相似文献
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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2018,130(31):9938-9942
Photocatalytic water splitting for hydrogen production using sustainable sunlight is a promising alternative to industrial hydrogen production. However, the scarcity of highly active, recyclable, inexpensive photocatalysts impedes the development of photocatalytic hydrogen evolution reaction (HER) schemes. Herein, a metal–organic framework (MOF)‐template strategy was developed to prepare non‐noble metal co‐catalyst/solid solution heterojunction NiS/ZnxCd1−xS with superior photocatalytic HER activity. By adjusting the doping metal concentration in MOFs, the chemical compositions and band gaps of the heterojunctions can be fine‐tuned, and the light absorption capacity and photocatalytic activity were further optimized. NiS/Zn0.5Cd0.5S exhibits an optimal HER rate of 16.78 mmol g−1 h−1 and high stability and recyclability under visible‐light irradiation (λ>420 nm). Detailed characterizations and in‐depth DFT calculations reveal the relationship between the heterojunction and photocatalytic activity and confirm the importance of NiS in accelerating the water dissociation kinetics, which is a crucial factor for photocatalytic HER. 相似文献
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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