Platinum single atom catalysts for hydrogen isotope separation during hydrogen evolution reaction

Xu, Jingsong; Li, Rui; Yan, Xiayan; Zhao, Qingkai; Zeng, Rongguang; Ba, Jingwen; Pan, Qifa; Xiang, Xin

doi:10.1007/s12274-022-4075-2

Cited by 24 publications

(8 citation statements)

References 58 publications

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“…The H/D separation factor was 4.0 ± 0.4 for pristine PITEM, which is close to the value reported, − and it increased to 6.0 ± 0.3 for PITEM-G. The former selectivity was the result of the H/D isotopic effect of hydrogen evolution reactions over Pt catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…For the water electrolysis process catalyzed by Pt (without graphene), Δ E is only related to the initial state; the separation ratio (α ∼ 10) can also be calculated by the theories above. However, the experimental measured H/D separation ratio for Pt-catalyzed water electrolysis is only about 2–6, − , which is much lower than the calculated value.…”

Section: Resultsmentioning

confidence: 99%

“…According to eqs –, the Δ E is 41 meV compared to the 60 meV calculated by Lozada’s theory, which resulted in a decrease in the H/D separation ratio from 11.2 to 4.9. The separation ratio of 4.9 is close to the value reported − (α = 2–6) as well as our experiment data (α ∼ 4.0 ± 0.4) (Figure c).…”

Section: Resultsmentioning

confidence: 99%

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Hydrogen Isotope Separation Using Graphene-Based Membranes in Liquid Water

et al. 2023

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Hydrogen isotope separation has been effectively achieved electrochemically by passage of gaseous H 2 /D 2 through graphene/Nafion composite membranes. Nevertheless, deuteron nearly does not exist in the form of gaseous D 2 in nature but as liquid water. Thus, it is a more feasible way to separate and enrich deuterium from water. Herein, we have successfully transferred monolayer graphene to a rigid and porous polymer substrate, PITEM (polyimide track-etched membrane), which could avoid the swelling problem of the Nafion substrate as well as keep the integrity of graphene. Meanwhile, defects in the large area of CVD graphene could be successfully repaired by interfacial polymerization resulting in a high separation factor. Moreover, a new model was proposed for the proton transport mechanism through monolayer graphene based on the kinetic isotope effect (KIE). In this model, graphene plays a significant role in the H/D separation process by completely breaking the O−H/O−D bond, which can maximize the KIE, leading to increased H/D separation performance. This work suggests a promising application for using monolayer graphene in the industry and proposes a pronounced understanding of proton transport in graphene.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Hydrogen Isotope Separation Using Graphene-Based Membranes in Liquid Water

et al. 2023

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“…In general, Pt single-atom (Pt SA ) is more reactive and unstable than the Pt cluster, which has garnered signicant interest for the HER. [86][87][88] By means of the precisely site-selective atom doping route, a porous Mn 3 O 4 NS supported Pt SA (Pt SA -Mn 3 O 4 ) based on the in situ anchoring of the Pt atoms in the Mn 3+ octahedral sites was fabricated, 89 during which the Mn 3+ sites were partially dissolved and thereby formed the vacancies for anchoring the Pt single atom. The Pt SA -Mn 3 O 4 catalyst exhibited superior electrocatalytic performance in an alkaline solution.…”

Section: Vacancy Engineeringmentioning

confidence: 99%

Tailoring supports for enhancing the electrocatalytic hydrogen evolution performance of platinum species: a review

Li¹,

Zeng²,

Zhang³

et al. 2023

J. Mater. Chem. A

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“…Recently, single-atom catalysts (SACs) have been among the most researched heterogeneous catalysts. 23–49 Many theoretical and experimental efforts have been made to employ SACs dispersed on different carriers to achieve high selectivity and maximum metal usage in catalysis. 50 The concept of SACs was first proposed by Zhang et al in 2011.…”

Section: Introductionmentioning

confidence: 99%