From atomic bonding to heterointerfaces: Co2P/WC constructed by lacunary polyoxometalates induced strategy as efficient hydrogen evolution electrocatalysts at all pH values

Yue, Changle; Liu, Na; Li, Yaping; Liu, Yang; Sun, Fengyue; Bao, Wenjing; Tuo, Yongxiao; Pan, Yuan; Jiang, Ping; Zhou, Yan; Lu, Yukun

doi:10.1016/j.jcis.2023.04.090

Cited by 10 publications

(4 citation statements)

References 50 publications

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“…Relative to the peaks of WC, some of the lower-intensity peaks at 34.50, 38.20, 39.57, and 52.38 • correspond to W 2 C of (001), (100), and (101) planes of simple hexagonal phase, respectively (JCPDS No. 35-0776) [33][34][35]. In addition, no significant peak attributed to RuNi alloy was observed, which was probably due to its low concentration.…”

Section: Synthesis and Characterisationmentioning

confidence: 92%

WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution

Bai,

Deng,

Lian

et al. 2023

Molecules

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Single-atom catalysts anchored to oxide or carbonaceous substances are typically tightly coordinated by oxygen or heteroatoms, which certainly impact their electronic structure and coordination environment, thereby affecting their catalytic activity. In this study, we prepared a stable oxygen evolution reaction (OER) catalyst on tungsten carbide using a simple pyrolysis method. The unique structure of tungsten carbide allows the atomic RuNi catalytic site to weakly bond to the surface W and C atoms. XRD patterns and HRTEM images of the WCx-RuNi showed the characteristics of phase-pure WC and W2C, and the absence of nanoparticles. Combined with XPS, the atomic dispersion of Ru/Ni in the catalyst was confirmed. The catalyst exhibits excellent catalytic ability, with a low overpotential of 330 mV at 50 mA/cm2 in 1 m KOH solutions, and demonstrates high long-term stability. This high OER activity is ascribed to the synergistic action of metal Ru/Ni atoms with double monomers. The addition of Ni increases the state density of WCx-RuNi near the Fermi level, promoting the adsorption of oxygen-containing intermediates and enhancing electron exchange. The larger proximity of the d band center to the Fermi level suggests a strong interaction between the d electrons and the valence or conduction band, facilitating charge transfer. Our research offers a promising avenue for reasonable utilization of inexpensive and durable WCx carrier-supported metal single-atom catalysts for electrochemical catalysis.

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Section: Synthesis and Characterisationmentioning

confidence: 92%

WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution

Bai,

Deng,

Lian

et al. 2023

Molecules

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“…To demonstrate the mechanism of HER, we introduced the adsorption energy ( E ads ): 62 E ads = E (surface+absorbate) − E surface − E adsorbate ,where E surface represents the surface energy of the Pt SA catalyst, E adsorbate is the energy of adsorbate, and E (surface+absorbate) is the total energy of the surface and adsorbate. The enthalpy of H adsorption Δ E H* at different sites is calculated as follows: 63 Δ E H* = E slab+H − E slab − E H ,where the E slab+H is the total enthalpy of H adsorbing on the catalysts, E slab is the enthalpy of the catalysts, and E H is half of the enthalpy of H 2 . The enthalpy of H 2 O adsorption Δ E H 2 O at different sites is calculated as follows: 64 Δ E H 2 O* = E slab+H 2 O* − E slab − E H 2 O* ,where the E slab+H 2 O* is the total enthalpy of H adsorbed on the catalysts, E slab is the enthalpy of the catalysts, and E H 2 O* is the enthalpy of H 2 O.…”

Section: Methodsmentioning

confidence: 99%

Hierarchically stabilized Pt single-atom catalysts induced by an atomic substitution strategy for an efficient hydrogen evolution reaction

Yue,

Feng,

Sun

et al. 2024

Energy Environ. Sci.

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“…The following supporting information can be downloaded at: https://www. mdpi.com/article/10.3390/ma16186119/s1, Figure S1: High-resolution XPS spectra of C 1s (a), N 1s (b) and P 2p (c) for NPC; Table S1: The comparison of the catalytic performance with other non-noble metal catalysts [7,[29][30][31][32][33][34][35][36]; Author Contributions: Conceptualization, J.M. and J.W.…”

Section: Supplementary Materialsmentioning

confidence: 99%

“…The following supporting information can be downloaded at: , Figure S1: High-resolution XPS spectra of C 1s (a), N 1s (b) and P 2p (c) for NPC; Table S1: The comparison of the catalytic performance with other non-noble metal catalysts [ 7 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]; Figure S2: XRD pattern of Co 2 P; Figure S3: LSV curves of Co 2 P/NPG synthesized with different contents of cobalt; Figure S4: TEM image of Co 2 P/NPG after stability test.…”

mentioning

confidence: 99%

A Green Synthesis Strategy for Cobalt Phosphide Deposited on N, P Co-Doped Graphene for Efficient Hydrogen Evolution

Ma,

Wang,

et al. 2023

Materials

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The exploitation of electrocatalysts with high activity and durability for the hydrogen evolution reaction is significant but also challenging for future energy systems. Transition metal phosphides (TMPs) have attracted a lot of attention due to their effective activity for the hydrogen evolution reaction, but the complicated preparation of metal phosphides remains a bottleneck. In this study, a green fabrication method is designed and proposed to construct N, P co-doped graphene (NPG)-supported cobalt phosphide (Co2P) nanoparticles by using DNA as both N and P sources. Thanks to the synergistic effect of NPG and Co2P, the Co2P/NPG shows effective activity with a small overpotential of 144 mV and a low Tafel slope of 72 mV dec−1 for the hydrogen evolution reaction. This study describes a successful green synthesis strategy for the preparation of high-performance TMPs.

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From atomic bonding to heterointerfaces: Co2P/WC constructed by lacunary polyoxometalates induced strategy as efficient hydrogen evolution electrocatalysts at all pH values

Cited by 10 publications

References 50 publications

WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution

WCx-Supported RuNi Single Atoms for Electrocatalytic Oxygen Evolution

Hierarchically stabilized Pt single-atom catalysts induced by an atomic substitution strategy for an efficient hydrogen evolution reaction

A Green Synthesis Strategy for Cobalt Phosphide Deposited on N, P Co-Doped Graphene for Efficient Hydrogen Evolution

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