Extraordinary activity of mesoporous carbon supported Ru toward the hydrogen oxidation reaction in alkaline media

Zeng, Liming; Peng, Hanqing; Liu, Wei; Yin, Jinlong; Xiao, Li; Lu, Juntao; Zhuang, Lin

doi:10.1016/j.jpowsour.2020.228147

Cited by 51 publications

(32 citation statements)

References 49 publications

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“…[ 31 ] In N 1s (Figure 1f) spectra of AlGaN:Ru NWs and bare AlGaN NWs, the peaks at 397.1 and 398.0 eV can be consistent with the value of AlN and GaN bonds respectively, [ 32 ] and the 398.6 eV, which does not appear in N 1s spectrum of bare AlGaN NWs, is assigned to RuN bond. [ 33 ] The XPS analysis unambiguously prove the strong interaction between Ru and AlGaN NWs. Together with above PL, STEM‐EDS mapping results, we can confirm that the Ru co‐catalysts were successfully anchored to the AlGaN nanowire surface.…”

Section: Resultsmentioning

confidence: 90%

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Wang

Huang

Liu

et al. 2020

Advanced Optical Materials

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Searching for power‐independent, compact, and highly environment‐sensitive photodetectors is a critical step towards the realization of next‐generation energy‐efficient and sustainable integrated optoelectronic systems. Particularly, the deep ultraviolet (UV) band, which has large photon energy, is extremely suitable for environment monitoring and invisible light communication application. Herein, the demonstration of self‐powered deep UV solar‐blind photodetectors in a photoelectrochemical (PEC) cell configuration is reported, adopting wide bandgap n‐type aluminum gallium nitride (AlGaN) nanowires as photoelectrode. After decorating nanowires with noble metal ruthenium (Ru), the constructed solar‐blind PEC photodetectors exhibited excellent responsivity of 48.8 mA W‐1, fast response speed (rise time of 83 ms and decay time of 19 ms) with large photocurrent density of 55 μA cm‐2 at 254 nm illumination. Such superior performance can be attributed to, firstly and foremost, the successful synthesis of highly uniform and defect‐free n‐type AlGaN nanowires which ensures efficient photogeneration via effective light‐harvesting, and secondly, the boosted carrier separation and collection efficiency through Ru decoration. This novel nanoarchitecture enables deep UV photodetection to work stably with low energy consumption, intriguingly, opening the possibility for the development of high‐performance PEC photodetectors based on group III‐nitride semiconductors covering the entire spectral range from infrared to deep UV.

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Section: Resultsmentioning

confidence: 90%

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Wang

Huang

Liu

et al. 2020

Advanced Optical Materials

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“…In addition, planes of the γ-Al 2 O 3 [46]. It is worth noting that, after encapsulation, the modification process could not be found after impregnating with 5 wt% Ru, only a small diffraction peak marked with "*", which is assigned to the (101) plane of Ru NPs [9,47], can be found. Through calculation by Scherrer equation, the crystallite size of Ru NPs from (101) plane is only 4.54 and 4.57 nm in sample 5%Ru/γ-Al 2 O 3 @ASMA and its counterpart 5%Ru/γ-Al 2 O 3 , respectively.…”

Section: Crystallinity and Textural Propertiesmentioning

confidence: 98%

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

et al. 2020

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In this work, a core-shell-like sphere ruthenium catalyst, named as 5%Ru/γ-Al2O3@ASMA, has been successfully synthesized through impregnating the ruthenium nanoparticles (NPs) on the surface of the amino poly (styrene-co-maleic) polymer (ASMA) encapsulating γ-Al2O3 pellet support. The interaction between the Ru cations and the electro-donating polymer shell rich in hydroxyl and amino groups through the coordination bond would guarantee that the Ru NPs can be highly dispersed and firmly embedded on the surface of the support. In addition, the solid sphere γ-Al2O3 pellet could serve as the core to support the resulted catalysts applied in the flow process in a trickle bed reactor to promote the productivity. The resulted catalyst 5%Ru/γ-Al2O3@ASMA can be applied efficiently in the glucose hydrogenation and presents a steadfast sorbitol yield of almost 90% both in batch reactor and the trickle bed reactor, indicating the potential feasibility of the core-shell-like catalyst in the efficient production of sorbitol.

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“…[23] During the calcination, in-situ doping of nitrogen plays an important role in promoting the metal ion transport conducting uniform dispersion of Ru clusters. [24] We observed the morphology of the catalysts using transmission electron microscopy (TEM). As expected, Ru clusters with an average size of approximately 1.79 nm evenly distribute on NC@WOC matrix without agglomeration (Figure 1a).…”

Section: Crystal Structures and Microstructure Analysismentioning

confidence: 99%

Interfacial Electronic Coupling of NC@WO₃‐W₂C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions

et al. 2021

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Designing a bifunctional catalyst for hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is significant toward developing sustainable hydrogen-electric conversion systems. Herein, a cost-effective bifunctional catalyst, Ru/N-doped Carbon@WO 3 -W 2 C (Ru/NC@WOC), was developed via co-precipitation and polyol reduction. Ru/NC@WOC showed superior HOR/HER activity in alkaline solution in comparison with commercial Pt/C. HOR electrochemical tests showed that the mass activity at 0.05 V (1.96 mA mg À 1 Ru ) and exchange-current density were 7.5 and 1.2 times that of Pt/C. Additionality, Ru/NC@WOC exhibited up 30-fold HOR activity in mass activity compared with benchmark Ru/C. Moreover, it also displayed exceptional electrocatalytic HER with overpotentials of 31 mV at 10 mA cm À 2 and 119 mV at 100 mA cm À 2 , surpassing Pt/C, benchmark Ru/C, and most of the previously reported electrocatalysts. The outstanding catalytic activity of Ru/ NC@WOC probably arises from the synergy between Ru and NC@WOC matrix, suitable hydrogen binding energy, and highly conductive substrate. Thus, this work may pave a new avenue to fabricate low-cost bifunctional HOR/HER catalysts for alkaline fuel cells and water electrolyzer.

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Extraordinary activity of mesoporous carbon supported Ru toward the hydrogen oxidation reaction in alkaline media

Cited by 51 publications

References 49 publications

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

Interfacial Electronic Coupling of NC@WO₃‐W₂C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions

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Extraordinary activity of mesoporous carbon supported Ru toward the hydrogen oxidation reaction in alkaline media

Cited by 51 publications

References 49 publications

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Highly Uniform, Self‐Assembled AlGaN Nanowires for Self‐Powered Solar‐Blind Photodetector with Fast‐Response Speed and High Responsivity

Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

Interfacial Electronic Coupling of NC@WO3‐W2C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions

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Interfacial Electronic Coupling of NC@WO₃‐W₂C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions