2019
DOI: 10.1021/acssuschemeng.8b04698
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Highly Efficient Supported Palladium–Gold Alloy Catalysts for Hydrogen Storage Based on Ammonium Bicarbonate/Formate Redox Cycle

Abstract: We have developed supported Pd–Au alloy catalysts for reversible hydrogen storage–release process with high efficiency based on the reversible reactions involving ammonium formate and bicarbonate. Supported Pd–Au random alloy catalysts exhibited a superior activity than supported monometallic Pd and Au catalysts in both bicarbonate hydrogenation and formate dehydrogenation under ambient conditions even without additives such as acids or bases. We used a series of Pd–Au alloy nanoparticles (NPs) supported on ac… Show more

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Cited by 44 publications
(44 citation statements)
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“…Figure S1 summarizes the turnover frequency (TOF; h –1 ) values obtained during the dehydrogenation of HCOONa/H 2 O, while Figure S2 shows the turnover number (TON) values at 2 h during the hydrogenation of NaHCO 3 . As noted in the Introduction, previous studies have established that C-based supported Pd catalysts show high levels of activity during these reactions. In particular, materials in which Pd was supported on activated carbon (AC) and Ketjen black (KB) exhibited better activity compared to most of the catalysts during both reactions in the present study. However, Pd supported on TiO 2 (rutile and anatase), especially rutile TiO 2 , showed superior activity during both reactions (TOF = 1425 h –1 , TON = 204) compared to materials made with various other supports, except for γ-Al 2 O 3 .…”
Section: Resultssupporting
confidence: 59%
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“…Figure S1 summarizes the turnover frequency (TOF; h –1 ) values obtained during the dehydrogenation of HCOONa/H 2 O, while Figure S2 shows the turnover number (TON) values at 2 h during the hydrogenation of NaHCO 3 . As noted in the Introduction, previous studies have established that C-based supported Pd catalysts show high levels of activity during these reactions. In particular, materials in which Pd was supported on activated carbon (AC) and Ketjen black (KB) exhibited better activity compared to most of the catalysts during both reactions in the present study. However, Pd supported on TiO 2 (rutile and anatase), especially rutile TiO 2 , showed superior activity during both reactions (TOF = 1425 h –1 , TON = 204) compared to materials made with various other supports, except for γ-Al 2 O 3 .…”
Section: Resultssupporting
confidence: 59%
“…A combination of Pd and both TiO 2 and Ag was found to be important with regard to achieving a high degree of activity during both the dehydrogenation of HCOONa/H 2 O and the hydrogenation of NaHCO 3 . Based on our own results and previous reports, proposed mechanisms for these reactions are shown in Scheme . In the dehydrogenation of HCOONa/H 2 O process (Scheme A), a lone electron pair of O atoms of formate is adsorbed on electron-deficient TiO 2 or Ag sites after which there is a nucleophilic attack by the lone electron pair of a H 2 O molecule on the C atom of the formate accompanied by H atom elimination.…”
Section: Resultsmentioning
confidence: 88%
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“…To improve the activity of bimetallic Pd−Au alloy catalyst there was a need to find out the structure and electronic state of the catalyst. Shishido and co‐workers also worked on Pd−Au alloy catalyst based on ammonium formate and bicarbonate system (Figure 10) for reversible hydrogen storage [79c] . The Pd−Au alloy catalyst was prepared by colloid immobilization method.…”
Section: Catalysts Used For Formate‐bicarbonate Conversionmentioning
confidence: 99%
“…In the recent years most of the work on advancement in formate‐bicarbonate‐based energy systems were either carried out on bimetallic/alloy‐based materials or utilizing different carbon support for metals [79b,c,82] . However, these works were mostly focused on enhancing the catalytic activity, and recyclability at mild or ambient conditions.…”
Section: Recent Advancement and New Insights In The Fieldmentioning
confidence: 99%