scholarly journals Effect of polyvinylpyrrolidone (PVP) on palladium catalysts for direct synthesis of hydrogen peroxide from hydrogen and oxygen

RSC Advances ◽  
2020 ◽  
Vol 10 (34) ◽  
pp. 19952-19960
Author(s):  
Geun-Ho Han ◽  
Seok-Ho Lee ◽  
Myung-gi Seo ◽  
Kwan-Young Lee
Keyword(s):  
Hydrogen Peroxide ◽  
Electronic State ◽  
Palladium Catalysts ◽  
Direct Synthesis ◽  
Active Species ◽  
P Addition

Addition of polyvinylpyrrolidone to Pd/SiO2 catalyst improved H2O2 selectivity by adjusting electronic state of palladium active species.

Direct synthesis of hydrogen peroxide using ceria-supported gold and palladium catalysts

2011 ◽  
Vol 178 (1) ◽  
pp. 47-50 ◽  
Author(s):  
Edwin N. Ntainjua ◽  
Marco Piccinini ◽  
James C. Pritchard ◽  
Jennifer K. Edwards ◽  
Albert F. Carley ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Palladium Catalysts ◽  
Direct Synthesis ◽  
Supported Gold

Effect of Halide and Acid Additives on the Direct Synthesis of Hydrogen Peroxide using Supported Gold-Palladium Catalysts

ChemSusChem ◽  
2009 ◽  
Vol 2 (6) ◽  
pp. 575-580 ◽  
Author(s):  
Edwin Ntainjua N. ◽  
Marco Piccinini ◽  
James C. Pritchard ◽  
Jennifer K. Edwards ◽  
Albert F. Carley ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Palladium Catalysts ◽  
Direct Synthesis ◽  
Gold Palladium Catalysts ◽  
Supported Gold

The direct synthesis of hydrogen peroxide using platinum promoted gold–palladium catalysts

2014 ◽  
Vol 4 (9) ◽  
pp. 3244-3250 ◽  
Author(s):  
Jennifer K. Edwards ◽  
James Pritchard ◽  
Peter J. Miedziak ◽  
Marco Piccinini ◽  
Albert F. Carley ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Palladium Catalysts ◽  
Direct Synthesis ◽  
Gold Palladium Catalysts

The direct synthesis of hydrogen peroxide using platinum promoted gold–palladium catalysts.

scholarly journals Silver–palladium catalysts for the direct synthesis of hydrogen peroxide

2017 ◽  
Vol 376 (2110) ◽  
pp. 20170058 ◽  
Author(s):  
Zainab Khan ◽  
Nicholas F. Dummer ◽  
Jennifer K. Edwards
Keyword(s):  
Hydrogen Peroxide ◽  
Photoelectron Spectroscopy ◽  
Palladium Catalysts ◽  
Bimetallic Catalyst ◽  
Direct Synthesis ◽  
Side Reactions ◽  
X Ray ◽  
Temperature Programmed ◽  
Silver Palladium ◽  
Subsequent Decomposition

A series of bimetallic silver–palladium catalysts supported on titania were prepared by wet impregnation and assessed for the direct synthesis of hydrogen peroxide, and its subsequent side reactions. The addition of silver to a palladium catalyst was found to significantly decrease hydrogen peroxide productivity and hydrogenation, but crucially increase the rate of decomposition. The decomposition product, which is predominantly hydroxyl radicals, can be used to decrease bacterial colonies. The interaction between silver and palladium was characterized using scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and temperature programmed reduction (TPR). The results of the TPR and XPS indicated the formation of a silver–palladium alloy. The optimal 1% Ag–4% Pd/TiO 2 bimetallic catalyst was able to produce approximately 200 ppm of H 2 O 2 in 30 min. The findings demonstrate that AgPd/TiO 2 catalysts are active for the synthesis of hydrogen peroxide and its subsequent decomposition to reactive oxygen species. The catalysts are promising for use in wastewater treatment as they combine the disinfectant properties of silver, hydrogen peroxide production and subsequent decomposition. This article is part of a discussion meeting issue ‘Providing sustainable catalytic solutions for a rapidly changing world’.

Theoretical study of size effects on the direct synthesis of hydrogen peroxide over palladium catalysts

2019 ◽  
Vol 369 ◽  
pp. 95-104 ◽  
Author(s):  
Pengfei Tian ◽  
Doudou Ding ◽  
Yang Sun ◽  
Fuzhen Xuan ◽  
Xingyan Xu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Size Effects ◽  
Palladium Catalysts ◽  
Theoretical Study ◽  
Direct Synthesis

Direct Synthesis of Hydrogen Peroxide from Hydrogen and Oxygen Over Palladium Catalysts Supported on SO3H-Functionalized SiO2 and TiO2

2009 ◽  
Vol 130 (3-4) ◽  
pp. 604-607 ◽  
Author(s):  
Sunyoung Park ◽  
Ji Chul Jung ◽  
Jeong Gil Seo ◽  
Tae Jin Kim ◽  
Young-Min Chung ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Palladium Catalysts ◽  
Direct Synthesis

Direct synthesis of hydrogen peroxide from hydrogen and oxygen over palladium catalysts supported on TiO2–ZrO2 mixed metal oxides

2009 ◽  
Vol 10 (13) ◽  
pp. 1762-1765 ◽  
Author(s):  
Sunyoung Park ◽  
Jeong Gil Seo ◽  
Ji Chul Jung ◽  
Sung-Hyeon Baeck ◽  
Tae Jin Kim ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Oxides ◽  
Palladium Catalysts ◽  
Direct Synthesis ◽  
Mixed Metal Oxides ◽  
Mixed Metal

scholarly journals Direct Synthesis of Hydrogen Peroxide under Semi-Batch Conditions over Un-Promoted Palladium Catalysts Supported by Ion-Exchange Sulfonated Resins: Effects of the Support Morphology

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 124 ◽  
Author(s):  
Francesco Frison ◽  
Chiara Dalla Valle ◽  
Claudio Evangelisti ◽  
Paolo Centomo ◽  
Marco Zecca
Keyword(s):  
Hydrogen Peroxide ◽  
Ion Exchange ◽  
Palladium Catalyst ◽  
Palladium Catalysts ◽  
Specific Activity ◽  
Direct Synthesis ◽  
Supported Catalyst ◽  
Ion Exchange Resin ◽  
Strictly Anaerobic ◽  
Reductive Treatment

Palladium catalysts supported by a mesoporous form of sulfonated poly-divinylbenzene, Pd/µS-pDVB10 (1%, w/w) and Pd/µS-pDVB35 (3.6% w/w), were applied to the direct synthesis of hydrogen peroxide from dihydrogen and dioxygen. The reaction was carried for 4 h out in a semibatch reactor with continuous feed of the gas mixture (H2/O2 = 1/24, v/v; total flow rate 25 mL·min−1), at 25 °C and 101 kPa. The catalytic performances were compared with those of a commercial egg-shell Pd/C catalyst (1%, w/w) and of a palladium catalyst supported by a macroreticular sulfonated ion-exchange resin, Pd/mS-pSDVB10 (1%, w/w). Pd/µS-pDVB10 and Pd/C showed the highest specific activity (H2 consumption rate of about 75–80 h−1), but the resin supported catalyst was much more selective (ca 50% with no promoters). The nanoparticles (NP) size was somewhat larger in Pd/µS-pDVB10, showing that either the reaction was structure insensitive or diffusion limited to some extent over Pd/C, in which the support is microporous. The open pore structure of Pd/µS-pDVB10, possibly ensuring the fast removal of H2O2 from the catalyst, could also be the cause of the relatively high selectivity of this catalyst. In summary, Pd/µS-pDVB10 was the most productive catalyst, forming ca 375 molH2O2·kgPd−1·h−1, also because it retained a constant selectivity, while the other ones underwent a more or less pronounced loss of selectivity after 80–90 min. Ageing experiments showed that for a palladium catalyst supported on sulfonated mesoporous poly-divinylbenzene storage under oxidative conditions implied some deactivation, but a lower drop in the selectivity; regeneration upon a reductive treatment or storage under strictly anaerobic conditions (dry-box) lead to an increase of the activity but to both a lower initial selectivity and a higher drop of selectivity with time.

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