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The d − p orbital hybridization on RhBi bimetallene for highly selective ethanol complete electrooxidation.

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Title: The d − p orbital hybridization on RhBi bimetallene for highly selective ethanol complete electrooxidation.
Authors: Wang, Li-Wen1 (AUTHOR), Xiao, Xue1 (AUTHOR), Zhong, Wei1 (AUTHOR), Yin, Shi-Bin2 (AUTHOR), Li, Ying1,3 (AUTHOR) liying0303@xust.edu.cn, Chen, Yu1 (AUTHOR) chenyu001@snnu.edu.cn, Ai, Xuan1 (AUTHOR) aixuan@snnu.edu.cn
Source: Chemical Engineering Journal. Feb2026, Vol. 530, pN.PAG-N.PAG. 1p.
Subjects: Bimetallic catalysts, Electrocatalysis, Alcohol oxidation, Carbon-carbon bonds, Fuel cells
Abstract: Direct ethanol fuel cells (DEFCs) represent a promising approach for sustainable energy, yet their performance is constrained by low C1 selectivity and rapid catalyst deactivation during ethanol oxidation. In this work, the RhBi bimetallene (RhBi-BML) is synthesized by a one-pot solvothermal method, exhibiting excellent catalytic activity and stability for the ethanol oxidation reaction (EOR). Specifically, the mass activity of the RhBi-BML reaches 1011.1 mA mg Rh −1 at 0.70 V vs. RHE, representing a 17.2-fold increase compared to commercial Rh black (58.9 mA mg Rh −1). Furthermore, using the RhBi-BML as the anode material in a full cell enables the assembled device to deliver a cell voltage of 0.80 V and a peak power density of 15.32 mW cm−2, both of which outperform the corresponding values obtained using commercial Pt/C as the anode. Combined theoretical and experimental studies demonstrate that d–p orbital hybridization plays a critical role in adjusting the electronic structure of the Rh surface, promoting dehydrogenation and C C bond cleavage, thus improving the EOR performance of the RhBi-BML. The insights gained from this study highlight the potential of p-block elements in tuning electronic structures and enhancing C C bond cleavage, offering a promising strategy for designing advanced catalysts for DEFCs. [Display omitted] • RhBi bimetallene is synthesized via a facile one-pot solvothermal method. • RhBi bimetallene exhibits high mass activity, excellent stability, and superior C1 selectivity for ethanol oxidation. • The d–p orbital hybridization facilitates efficient C C bond cleavage during ethanol oxidation. • The full cell delivers a peak power density of 15.32 mW cm−2, surpassing that of commercial Pt/C as the anode. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Direct ethanol fuel cells (DEFCs) represent a promising approach for sustainable energy, yet their performance is constrained by low C1 selectivity and rapid catalyst deactivation during ethanol oxidation. In this work, the RhBi bimetallene (RhBi-BML) is synthesized by a one-pot solvothermal method, exhibiting excellent catalytic activity and stability for the ethanol oxidation reaction (EOR). Specifically, the mass activity of the RhBi-BML reaches 1011.1 mA mg Rh −1 at 0.70 V vs. RHE, representing a 17.2-fold increase compared to commercial Rh black (58.9 mA mg Rh −1). Furthermore, using the RhBi-BML as the anode material in a full cell enables the assembled device to deliver a cell voltage of 0.80 V and a peak power density of 15.32 mW cm−2, both of which outperform the corresponding values obtained using commercial Pt/C as the anode. Combined theoretical and experimental studies demonstrate that d–p orbital hybridization plays a critical role in adjusting the electronic structure of the Rh surface, promoting dehydrogenation and C C bond cleavage, thus improving the EOR performance of the RhBi-BML. The insights gained from this study highlight the potential of p-block elements in tuning electronic structures and enhancing C C bond cleavage, offering a promising strategy for designing advanced catalysts for DEFCs. [Display omitted] • RhBi bimetallene is synthesized via a facile one-pot solvothermal method. • RhBi bimetallene exhibits high mass activity, excellent stability, and superior C1 selectivity for ethanol oxidation. • The d–p orbital hybridization facilitates efficient C C bond cleavage during ethanol oxidation. • The full cell delivers a peak power density of 15.32 mW cm−2, surpassing that of commercial Pt/C as the anode. [ABSTRACT FROM AUTHOR]
ISSN:13858947
DOI:10.1016/j.cej.2026.173544