Doping Ruthenium into Metal Matrix for Promoted pH‐Universal Hydrogen Evolution

Jiao, Jian; Zhang, Nannan; Zhang, Chao; Sun, Ning; Pan, Yuan; Chen, Chen; Li, Jun; Tan, Meijie; Cui, Ruixue; Shi, Zhaolin; Xiao, Hai; Lu, Tong‐Bu

doi:10.1002/advs.202200010

Cited by 42 publications

(24 citation statements)

References 45 publications

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“…Similarly, as shown in the high-resolution Te 3d XPS profile (Figure c), the two peaks at 575.9 and 586.2 eV could be assigned to Te 4+ , and the other two peaks at 570.0 and 582.3 eV could be attributed to Te 0 . Furthermore, as shown in Figure d, the electron paramagnetic resonance (EPR) profiles revealed a distinct signal at g = 2.003, which is attributed to the oxygen vacancies in Bi/NCNSs and Bi(Te) 2 /NCNSs. − The EPR of Bi(Te) 2 /NCNSs displayed higher intensity than that of Bi/NCNSs, indicating that Bi(Te) 2 /NCNSs has more oxygen vacancies due to Te doping. From the above data, it can be inferred that oxidation of the Bi surface was restrained after Te doping, which is beneficial to the formation of the intermediate for formate .…”

Section: Resultsmentioning

confidence: 94%

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction

et al. 2022

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For electrochemical CO2 reduction (CO2RR), proton transfer plays a major role in determining the selectivity, and the behavior of interfacial water is a key factor in the entire process. Herein, tellurium (Te)-doped bismuth (Bi) nanoparticles are prepared on ultrathin nitrogen-doped carbon nanosheets (NCNSs) via an in situ reduction method. Te doping alters the electronic structure of Bi by lowering the oxidation state and increasing oxygen vacancies. The adsorption of H2O molecules at the catalytic interface weakens, as revealed by operando attenuated total reflection surface-enhanced infrared absorption spectroscopy. The weakened water adsorption favors the formation of intermediates and, meanwhile, helps to suppress HER. With the Te dopant, a faradic efficiency above 90% for formate over a broad window from −0.8 to −1.2 V (vs RHE) is achieved, and the partial current density for formate reaches 130 mA cm–2 at −1.2 V (vs RHE) for CO2RR.

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Section: Resultsmentioning

confidence: 94%

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction

et al. 2022

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“…20 The use of noble metal atom doping to adjust the electronic state of the surrounding atoms was also proposed to improve the activity of the catalyst. [34][35][36] Lu et al designed a surface-engineering strategy to dope Ru into the subsurface of the Co matrix as a HER catalyst. 34 DFT results showed that Ru doping in the subsurface dramatically enhances the catalytic activity for the HER and the Ru doped into the subsurface was thermodynamically more stable than that the Ru alloyed on the surface.…”

Section: Strategy For D-band Center Modulationmentioning

confidence: 99%

Electrocatalyst design for the conversion of energy molecules: electronic state modulation and mass transport regulation

Wang

Wei

et al. 2022

Chem. Commun.

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Section: Ph‐universal Ru‐based Electrocatalysts Toward Hermentioning

confidence: 99%

Recent Research Advances in Ruthenium‐Based Electrocatalysts for Water Electrolysis Across the pH‐Universal Conditions

Fan

Pang

2022

Energy Tech

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Sustainable production of green energy is the most promising way to solve the present energy crisis. [1] Hydrogen is considered an ideal selection because of its high-energy density and zero emission of CO 2 , whose realization would be a revolutionary victory in the energy field. [2] Among the known technologies of hydrogen evolution, electrochemical water splitting operated through renewable energy is an efficient and mild pathway to collect purified hydrogen. [3] Water splitting proceeds via two half-reactions, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Compared to the two-electron transfer process of HER, OER originating at the anode displays the kinetically sluggish involving four proton-coupled electron transfers to generate oxygen. [4] As reported, OER requires the electrode voltage of 1.23 V under standard conditions, which determines the baseline value for overall water splitting. [5] However, many additional factors, including the impedances of electrode materials and interface, electrolyte, and temperature that slow down the reaction rate, drive up the demand for action potential under a practical environment. [6] Particularly, the complexity of electrolyte composition with different pH levels raises higher requirements for catalysts, making electrode materials with strong corrosion resistance more valuable. [7] However, the achievements, describing catalysts with satisfactory performance toward HER and OER in the full pH range, are limited. [8] Therefore, the development of economical, efficient, and bifunctional electrocatalysts working in pH-universal electrolytes is an attractive and challenging task.To date, noble metal-based catalysts are recognized as the state-of-the-art catalysts for HER (Pt-based materials) and OER (Ir-based oxides-IrO 2 ). [9] Pt-based electrocatalyst effortlessly exhibits the objective rate of hydrogen production in acidic environments, as well as IrO 2 as the benchmark electrocatalyst efficaciously promotes the sluggish OER in the alkaline medium. However, the noble and scarce nature largely hinders the large-scale application of Pt/Ir. [10] Most importantly, their single function makes themselves impossible to accomplish overall water splitting alone. To continue this interesting research, researchers have made great efforts to explore suitable substitutes. The diverse materials containing non-precious metals and related composites have been explored and evaluated, due to their earth abundance, low cost, and high efficiency. [11] Despite these materials displaying inspiring activity being comparable to noble metals, they are limited to a narrow pH range, thus be difficult to steadily provide long-lasting active output. [12] Ruthenium (Ru), one of the cheaper Pt group metals, exhibits Pt-like HER activity due to the similar hydrogen bond strength with Pt. [13] Ru-based materials bring an eclectic

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Doping Ruthenium into Metal Matrix for Promoted pH‐Universal Hydrogen Evolution

Cited by 42 publications

References 45 publications

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction

Electrocatalyst design for the conversion of energy molecules: electronic state modulation and mass transport regulation

Recent Research Advances in Ruthenium‐Based Electrocatalysts for Water Electrolysis Across the pH‐Universal Conditions

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Doping Ruthenium into Metal Matrix for Promoted pH‐Universal Hydrogen Evolution

Cited by 42 publications

References 45 publications

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO2 Reduction

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO2 Reduction

Electrocatalyst design for the conversion of energy molecules: electronic state modulation and mass transport regulation

Recent Research Advances in Ruthenium‐Based Electrocatalysts for Water Electrolysis Across the pH‐Universal Conditions

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Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction

Revealing the Behavior of Interfacial Water in Te-Doped Bi via Operando Infrared Spectroscopy for Improving Electrochemical CO₂ Reduction