Interface engineering of Pt and CeO2 nanorods with unique interaction for methanol oxidation

Li, Tao; Shi, Yongliang; Huang, Yu‐Cheng; Chen, Ru; Zhang, Yiqiong; Huo, Jia; Zou, Yuqin; Yu, Gang; Luo, Jun; Dong, Chung‐Li; Wang, Shuangyin

doi:10.1016/j.nanoen.2018.09.013

Cited by 226 publications

(124 citation statements)

References 21 publications

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“…The model showed the electron density of Cu in Cu/Cu 2 O NWAs minus the electron density of Cu in pure Cu NWAs, and the extra electronic cloud was the yellow part. Thus, it can be deduced that high electronic density of Cu induced the decrease of reaction barrier and suppresses the competitive H 2 production, leading to high conversion rate, Faradaic efficiency, and selectivity of Cu/Cu 2 O for NRA.…”

Section: Figurementioning

confidence: 99%

Unveiling the Activity Origin of a Copper‐based Electrocatalyst for Selective Nitrate Reduction to Ammonia

et al. 2020

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Unveiling the active phase of catalytic materials under reaction conditions is important for the construction of efficient electrocatalysts for selective nitrate reduction to ammonia. The origin of the prominent activity enhancement for CuO (Faradaic efficiency: 95.8 %, Selectivity: 81.2 %) toward selective nitrate electroreduction to ammonia was probed. 15N isotope labeling experiments showed that ammonia originated from nitrate reduction. 1H NMR spectroscopy and colorimetric methods were performed to quantify ammonia. In situ Raman and ex situ experiments revealed that CuO was electrochemically converted into Cu/Cu2O, which serves as an active phase. The combined results of online differential electrochemical mass spectrometry (DEMS) and DFT calculations demonstrated that the electron transfer from Cu2O to Cu at the interface could facilitate the formation of *NOH intermediate and suppress the hydrogen evolution reaction, leading to high selectivity and Faradaic efficiency.

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Section: Figurementioning

confidence: 99%

Unveiling the Activity Origin of a Copper‐based Electrocatalyst for Selective Nitrate Reduction to Ammonia

et al. 2020

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“…Strategies to improve the ORR activity are often optimized by choosing specific support, reducing particle‐size, tuning particle structure, or adding foreign promoters 30–33. In view of the electronic interaction effect, modification of transition metal‐based catalysts with foreign promoters should be a reliable strategy to regulate their electrocatalytic performance 33–37. Recently, rare earth oxides (REO) have attracted special interest as the foreign promoters to modulate the electrocatalytic properties of various transition metals33,38–42 owing to their unique electronic and chemical properties of 4f subshell electrons 43,44.…”

Section: Introductionmentioning

confidence: 99%

Gadolinium‐Induced Valence Structure Engineering for Enhanced Oxygen Electrocatalysis

Wang

Yang

et al. 2020

Advanced Energy Materials

131

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Rare earth doped materials with unique electronic ground state configurations are considered emerging alternatives to conventional Pt/C for the oxygen reduction reaction (ORR). Herein, gadolinium (Gd)‐induced valence structure engineering is, for the first, time investigated for enhanced oxygen electrocatalysis. The Gd2O3–Co heterostructure loaded on N‐doped graphene (Gd2O3–Co/NG) is constructed as the target catalyst via a facile sol–gel assisted strategy. This synthetic strategy allows Gd2O3–Co nanoparticles to distribute uniformly on an N‐graphene surface and form intimate Gd2O3/Co interface sites. Upon the introduction of Gd2O3, the ORR activity of Gd2O3–Co/NG is significantly increased compared with Co/NG, where the half‐wave potential (E1/2) of Gd2O3–Co/NG is 100 mV more positive than that of Co/NG and even close to commercial Pt/C. The density functional theory calculation and spectroscopic analysis demonstrate that, owing to intrinsic charge redistribution at the engineered interface of Gd2O3/Co, the coupled Gd2O3–Co can break the OOH*–OH* scaling relation and result in a good balance of OOH* and OH* binding on Gd2O3–Co surface. For practical application, a rechargeable Zn–air battery employing Gd2O3–Co/NG as an air–cathode achieves a large power density and excellent charge–discharge cycle stability.

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“…Platinum (Pt)-based materials are well known for their electrocatalytic activity toward ORR [9][10][11][12] . However, Pt-based catalysts are expensive, have slow electron-transfer kinetics, and relatively poor stability, which limits their commercialization for use in fuel cells [13][14][15][16][17][18][19][20] . Consequently, the design and preparation of low-cost and high-performance electrocatalysts for the ORR is an active and promising field of research.…”

Section: Introductionmentioning

confidence: 99%

Defective ZnS nanoparticles anchored in situ on N-doped carbon as a superior oxygen reduction reaction catalyst

Wei

et al. 2019

Journal of Energy Chemistry

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Interface engineering of Pt and CeO2 nanorods with unique interaction for methanol oxidation

Cited by 226 publications

References 21 publications

Unveiling the Activity Origin of a Copper‐based Electrocatalyst for Selective Nitrate Reduction to Ammonia

Unveiling the Activity Origin of a Copper‐based Electrocatalyst for Selective Nitrate Reduction to Ammonia

Gadolinium‐Induced Valence Structure Engineering for Enhanced Oxygen Electrocatalysis

Defective ZnS nanoparticles anchored in situ on N-doped carbon as a superior oxygen reduction reaction catalyst

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