Multifunctional Co–B–O@CoxB catalysts for efficient hydrogen generation

Guo, Yanhui; Zhang, Ruiqi; Hao, Weiju; Zhang, Jiankan; Yang, Yanjing

doi:10.1016/j.ijhydene.2019.09.008

Cited by 22 publications

(10 citation statements)

References 52 publications

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“…The Co 2þ state related to the cobalt oxide peak was attributed to CoO, which might be due to the electron transfer between Co-B and Ag during the preparation of the catalyst. [31,[54][55][56] The addition of Ag changed the electron environment of the Co-B structure. [41] Furthermore, the Co peaks of Ag/Co-B/CTAB catalysts shifted positively (with larger BE) compared with the Co-B/CTAB catalysts, which is attributed to the stable structure of Co. [22,31,41,55,57] The XPS peak at 191.4 eV corresponded to the oxidation state level of B1s in Ag/Co-B/CTAB (Figure 3b) and was similar to the B1s level reported in the literature.…”

Section: Catalytic Characterization Resultsmentioning

confidence: 99%

Synthesis of a Novel Ag/Co–B/CTAB Catalyst via Chemical Reaction at Room Temperature for Hydrolysis of Ammonia Borane

et al. 2022

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Co–B has outstanding catalytic activity in catalyzing the hydrolysis of ammonia borane (AB) to produce hydrogen and has been widely studied and applied. However, the high surface energy and magnetic properties of Co–B catalysts make the particles easily agglomerate and have few active sites. Herein, a novel compound Ag/Co–B/CTAB with high catalytic activity is prepared by chemical reduction. The compound Ag/Co–B/CTAB is characterized by Fourier‐transform infrared, X‐Ray diffraction, X‐Ray photoelectron spectroscopy, and transmission electron microscopy, which show that Ag+ in the compound Ag/Co–B/CTAB is reduced entirely to Ag acting as an atomic barrier to improve dispersion of Co–B due to a large specific surface area (168.8153 m2 g−1). Moreover, the performance of Co–B doped with Ag in the hydrolysis of AB is studied and the compound Ag/Co–B/CTAB has a hydrogen generation rate of 17.685 L min−1·g−1 at 30 °C with a low activation energy of 13.33 kJ mol−1. The work on the Ag/Co–B/CTAB catalyst provides an essential insight into developing efficient hydrogen‐producing catalysts by regulating the electron transfer between metal and Co–B.

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Section: Catalytic Characterization Resultsmentioning

confidence: 99%

Synthesis of a Novel Ag/Co–B/CTAB Catalyst via Chemical Reaction at Room Temperature for Hydrolysis of Ammonia Borane

et al. 2022

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“…It has been reported that in the amorphous boride system, there is a reverse charge transfer from boron to metal that enriches the electron density of the metal, and is beneficial for electrochemical catalysis. 82 However, the efficiency of single metal borides is limited. In order to solve this problem, foreign metals are appropriately added to single metal borides to adjust the morphology and electronic arrangement to maximize the catalytic performance.…”

Section: Cobalt-based Boridesmentioning

confidence: 99%

Recent advances in cobalt-based catalysts for efficient electrochemical hydrogen evolution: a review

et al. 2022

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“…[36] Copyright 2018, Royal Society of Chemistry. e) Low-magnification TEM image for F-Co 2 B; f) High-Resolution TEM image of the crystalline region (marked as a white circle in e) in which the inset shows the clear lattice fringe of the crystalline Co 2 B phase; g) Current difference between anodic and cathodic sweeps as a function of scan rate (20,40,60,80, 100 and 120 mV s −1 ). The dashed line is a linear fit of the data where the slope of the fitted line was used to calculate the electrochemical double layer capacitance, C dl ; h) Computed energy landscapes for crystalline and amorphous F-Co 2 B phases with U = 1.23 V. Reproduced with permission.…”

Section: Cations Dopingmentioning

confidence: 99%

Development Strategies in Transition Metal Borides for Electrochemical Water Splitting

Yao

Zhao-yuan

Jiao

2021

Energy & Environ Materials

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Electrochemical water splitting is a feasible method for producing environmental benignity energy of hydrogen, while high price and low availability on the earth of noble electrocatalysts constrain their global-scale application. Transition metal borides (TMBs) have displayed unique metalloid characteristic and outstanding performance for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in the last few decades. Herein, recent developments of the TMBs for HER and OER are summarized. Initially, the impact factors and relevant evaluation of electrocatalytic performance are described, that is, overpotential, Tafel slope and exchange current density, stability, faradaic efficiency, turnover frequency, mass and specific activities. Moreover, the optimization strategies of borides are emphasized, which principally include coupling with effective substrates, elemental doping, phase modification, interfacial engineering, and morphology control. Finally, in order to reach the goal of application, the remaining challenges and perspectives are given to point out a direction for enhancing the performance of borides.

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Multifunctional Co–B–O@CoxB catalysts for efficient hydrogen generation

Cited by 22 publications

References 52 publications

Synthesis of a Novel Ag/Co–B/CTAB Catalyst via Chemical Reaction at Room Temperature for Hydrolysis of Ammonia Borane

Synthesis of a Novel Ag/Co–B/CTAB Catalyst via Chemical Reaction at Room Temperature for Hydrolysis of Ammonia Borane

Recent advances in cobalt-based catalysts for efficient electrochemical hydrogen evolution: a review

Development Strategies in Transition Metal Borides for Electrochemical Water Splitting

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