Palladium nanoclusters decorated partially decomposed porous ZIF-67 polyhedron with ultrahigh catalytic activity and stability on hydrogen generation

Wu, Chongbei; Guo, Jingya; Zhang, Jifang; Zhao, Yi; Tian, Jianniao; Isimjan, Tayirjan Taylor; Yang, Yuting

doi:10.1016/j.renene.2018.09.070

Cited by 57 publications

(25 citation statements)

References 52 publications

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“…The Co 2p spectra exhibited four peaks at a binding energy of 780.8, 782.5, 796.7 and 798.3 eV, which are assigned to Co 3+ 2p 3/2 , Co 2+ 2p 3/2 , Co 3+ 2p 1/2 and Co 2+ 2p 1/2 , respectively (Figure c) . It should be noted that two peaks at 786.78 and 804.28 eV are ascribed to shake‐up satellite peaks of Co 2+ . Also, the peak located at 398.7 eV represented the tertiary N bonded to carbon atoms (Figure d) .…”

Section: Resultsmentioning

confidence: 96%

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Naghshbandi

Sansano

2020

Applied Organom Chemis

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Nowadays one of the great challenges is to design new bimetallic catalysts with enhanced catalytic activity, selectivity and recycling properties. In this work, the preparation of new Co/Cu bimetallic Zeolitic Imidazolate Framework (Co‐Cu/ZIF) as an efficient catalyst for the reduction of nitro compounds and organic dyes is described. Co‐Cu/ZIF was characterized with different techniques such as SEM, TEM, XRD, XPS, TGA, FT‐IR and UV–vis absorption indicating formation of entirely uniform cubic particles. Using this catalyst, structurally different aromatic nitro compounds were reduced efficiently to corresponding amines in excellent yields. Kinetic studies revealed that the reduction rates of nitrophenol isomers follow 3‐NP > 4‐NP > 2‐NP order. The catalytic activity of Co‐Cu/ZIF was further investigated in the reduction of organic dyes such as methyl orange (MO) and rhodamine B (RhB). This catalyst was recycled for at least ten runs in the reduction of 4‐nitrophenol without a noticeable decrease in activity and reused catalyst was characterized.

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Section: Resultsmentioning

confidence: 96%

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Naghshbandi

Sansano

2020

Applied Organom Chemis

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“…After the fifth cycle, it retained about 73.6 % of its initial catalytic capacity (Figure 5d). The slight decrease in catalytic activity may be due to the spalling of Ru species (after five cycles, the mass fraction of Ru species was reduced to 1.8 wt.% by ICP, Table S1), structural damage, and catalyst poisoning [15b,17] …”

Section: Resultsmentioning

confidence: 99%

Well‐Dispersed Ru‐Clusters Decorating Nanobox‐Structured CoP Synergistically Catalyze the NaBH₄ Hydrolysis and Electro‐Reductive H₂ Evolution

Dou

Shi

et al. 2021

ChemCatChem

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The high‐efficiency multifunctional materials have considerable significance in the area of sustainable energy to developing a cross‐usable and low‐cost catalyst. Nevertheless, substantial challenges are ahead on designing and synthesizing a high performance in a scalable and straightforward manner. Here, we have developed a novel bifunctional catalyst based on Ru/CoP nanoboxes (NBs) prepared using ZIF‐67 as a precursor. The nano hollow box structure and the strong electronic interaction between Ru clusters and CoP component are confirmed. The Ru/CoP NBs as a catalyst show excellent activities for catalytic NaBH4 hydrolysis such as high turnover frequency (1202.2 min−1), and small electrocatalytic H2 evolution overpotential (49 mV@10 mA cm−2) under ambient conditions. Besides, Ru/CoP NBs also display good stability and reusability. The excellent catalytic performance of Ru/CoP NBs is attributed to the synergy between Ru clusters and CoP species as well as the unique morphology that accelerates charge transfer, provides higher active surface area, and facilitates solute transport and gas emission.

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“…The quenched PL (Figure S15a, Supporting Information) and increased photocurrent response (Figure S15b, Supporting Information) of Co 6 wt%/CTHP 30 compared with CTHP 30 indicates reduced carrier recombination, implying that the addition of Co species could serve as trapping centers for charge carriers to promote charge separation and mobility. [ 1b,30 ] In the presence of the 6 wt% Co cocatalyst, the O 2 production rate for CTHP 30 (221 µmol h −1 g −1 ) was 9.6 times higher than that of pristine CN (23 µmol h −1 g −1 ), 15.8 times that of THP (14 µmol h −1 g −1 ), and 1.5 times that of CHP (143 µmol h −1 g −1 ). This should be attributed to CTHP 30 had the narrowest bandgap of 2.65 eV compared with the pristine CN, CTHP 20 , and CTHP 50 , and the potential of the CBM of CTHP 30 is lower than CTHP 20 , and CTHP 50 , which would provide a strong thermodynamic driving force for OER (Figure S16, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Polymeric Cyanamide‐Triazole‐Heptazine Photocatalysts for Highly‐Efficient Water Splitting

Yin

et al. 2020

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Conjugated polymers are promising light harvesters for water reduction/oxidation due to their simple synthesis and adjustable bandgap. Herein, both cyanamide and triazole functional groups are first incorporated into a heptazine‐based carbon nitride (CN) polymer, resulting in a mesoporous conjugated cyanamide‐triazole‐heptazine polymer (CTHP) with different compositions by increasing the quantity of cyanamide/triazole units in the CN backbone. Varying the compositions of CTHP modulates its electronic structures, mesoporous morphologies, and redox energies, resulting in a significantly improved photocatalytic performance for both H2 and O2 evolution under visible light irradiation. A remarkable H2 evolution rate of 12723 µmol h−1 g−1 is observed, resulting in a high apparent quantum yield of 11.97% at 400 nm. In parallel, the optimized photocatalyst also exhibits an O2 evolution rate of 221 µmol h−1 g−1, 9.6 times higher than the CN counterpart, with the value being the highest among the reported CN‐based bifunctional photocatalysts. This work provides an efficient molecular engineering approach for the rational design of functional polymeric photocatalysts.

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Palladium nanoclusters decorated partially decomposed porous ZIF-67 polyhedron with ultrahigh catalytic activity and stability on hydrogen generation

Cited by 57 publications

References 52 publications

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Well‐Dispersed Ru‐Clusters Decorating Nanobox‐Structured CoP Synergistically Catalyze the NaBH₄ Hydrolysis and Electro‐Reductive H₂ Evolution

Mesoporous Polymeric Cyanamide‐Triazole‐Heptazine Photocatalysts for Highly‐Efficient Water Splitting

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Palladium nanoclusters decorated partially decomposed porous ZIF-67 polyhedron with ultrahigh catalytic activity and stability on hydrogen generation

Cited by 57 publications

References 52 publications

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Well‐Dispersed Ru‐Clusters Decorating Nanobox‐Structured CoP Synergistically Catalyze the NaBH4 Hydrolysis and Electro‐Reductive H2 Evolution

Mesoporous Polymeric Cyanamide‐Triazole‐Heptazine Photocatalysts for Highly‐Efficient Water Splitting

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Well‐Dispersed Ru‐Clusters Decorating Nanobox‐Structured CoP Synergistically Catalyze the NaBH₄ Hydrolysis and Electro‐Reductive H₂ Evolution