CeO2 as an “electron pump” to boost the performance of Co4N in electrocatalytic hydrogen evolution, oxygen evolution and biomass oxidation valorization

“…Subsequently, H* undergoes the Heyrovsky or Tafel steps to generate H 2 . For Ni 2 P@CeO 2 hybrid nanoarrays, due to the existence of abundant oxygen vacancy in CeO 2 phase, it possesses the excellent a nity for oxygen-containing species [41]. Therefore, as displayed in Fig.…”

Section: Electrocatalytic Performancementioning

confidence: 99%

Construction of Interface-Engineered Coral-like Ni2P@CeO2 Hybrid Nanoarrays to Boost Electrocatalytic Hydrogen Evolution Performance in alkaline water/seawater electrolytes

Lyu

Cheng

Wang

et al. 2023

Preprint

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Fabricating a functional heterogeneous interface to enhance the catalytic performance is quite significant for developing high-efficient electrocatalysts. Herein, we designed a coral-like Ni2P@CeO2 hybrid nanoarrays on nickel foam via selective-phosphorization of Ni(OH)2@CeO2. Benefiting from CeO2 as the “electron pump”, it leads to electrons transfer from Ni2P to CeO2 side, and induces the electrons redistribution in interface boundary, thereby optimizing the H* adsorption free energy in HER process. As proposed, owing to the superior affinity to oxygen-containing species of CeO2, the H2O molecule will preferentially adsorb on CeO2 side, and easily decompose into OH* and H* with lower energy barrier. Subsequently, benefiting from the lower H* adsorption free energy of P sites, the generated H* will transfer to Ni2P side through spillover process. Contributing to the synergistic effect of double-active sites, the Ni2P@CeO2/NF electrode exhibits brilliant catalytic performance for HER with 62 mV to attain 10 mA/cm2 and exceptional durability over 100 h in 1 M KOH solution under ~ 100 mA/cm2. Meanwhile, attributing to the similar interface electrons redistribution effect, the precursor Ni(OH)2@CeO2/NF also displays excellent OER electrocatalytic performance, it only requires 229 mV to arrive 10 mA/cm2, even better than benchmark RuO2. Hence, the assembled Ni(OH)2@CeO2/NF||Ni2P@CeO2/NF system only needs 1.53 V to achieve 10 mA/cm2 in basic solution. Moreover, the electrolyzer also presents brilliant electrocatalytic activity and stability in natural seawater alkaline electrolyte with higher reserves on earth. This research offers a novel insight to enhance the catalytic properties of TMPs materials for hydrogen production.

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“…Therefore, CeO 2 -based nanocatalysts can be used in many oxidation reactions or in the hydrogenation of -NO 2 functional groups. [20][21][22][23][24][25][26][27][28][29][30] CeO 2 has different morphologies with the exposure of different crystal planes. The crystal plane effect is an influential factor in many reactions; 31,32 for example, CO oxidation, [33][34][35][36][37] and the water-gas shift reaction, [38][39][40] and so on.…”

Section: Introductionmentioning

confidence: 99%

Structure engineering of CeO₂for boosting the Au/CeO₂nanocatalyst in the green and selective hydrogenation of nitrobenzene

Jing

Liang

et al. 2023

Nanoscale Horiz.

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CeO2 as an “electron pump” to boost the performance of Co4N in electrocatalytic hydrogen evolution, oxygen evolution and biomass oxidation valorization

Cited by 114 publications

References 70 publications

Mechanochemical preparation of graphdiyne (C_nH_2n−2) based Ni-doped MoS₂S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Mechanochemical preparation of graphdiyne (C_nH_2n−2) based Ni-doped MoS₂S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Construction of Interface-Engineered Coral-like Ni2P@CeO2 Hybrid Nanoarrays to Boost Electrocatalytic Hydrogen Evolution Performance in alkaline water/seawater electrolytes

Structure engineering of CeO₂for boosting the Au/CeO₂nanocatalyst in the green and selective hydrogenation of nitrobenzene

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CeO2 as an “electron pump” to boost the performance of Co4N in electrocatalytic hydrogen evolution, oxygen evolution and biomass oxidation valorization

Cited by 114 publications

References 70 publications

Mechanochemical preparation of graphdiyne (CnH2n−2) based Ni-doped MoS2S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Mechanochemical preparation of graphdiyne (CnH2n−2) based Ni-doped MoS2S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Construction of Interface-Engineered Coral-like Ni2P@CeO2 Hybrid Nanoarrays to Boost Electrocatalytic Hydrogen Evolution Performance in alkaline water/seawater electrolytes

Structure engineering of CeO2for boosting the Au/CeO2nanocatalyst in the green and selective hydrogenation of nitrobenzene

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Mechanochemical preparation of graphdiyne (C_nH_2n−2) based Ni-doped MoS₂S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Mechanochemical preparation of graphdiyne (C_nH_2n−2) based Ni-doped MoS₂S-scheme heterojunctions within situXPS characterization for efficient hydrogen production

Structure engineering of CeO₂for boosting the Au/CeO₂nanocatalyst in the green and selective hydrogenation of nitrobenzene