PMID- 28541678
OWN - NLM
STAT- MEDLINE
DCOM- 20180112
LR  - 20181202
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 51
IP  - 13
DP  - 2017 Jul 5
TI  - Identification of Active Hydrogen Species on Palladium Nanoparticles for an 
      Enhanced Electrocatalytic Hydrodechlorination of 2,4-Dichlorophenol in Water.
PG  - 7599-7605
LID - 10.1021/acs.est.7b01128 [doi]
AB  - Clarifying hydrogen evolution and identifying the active hydrogen species are 
      crucial to the understanding of the electrocatalytic hydrodechlorination (EHDC) 
      mechanism. Here, monodisperse palladium nanoparticles (Pd NPs) are used as a 
      model catalyst to demonstrate the potential-dependent evolutions of three 
      hydrogen species, including adsorbed atomic hydrogen (H*(ads)), absorbed atomic 
      hydrogen (H*(abs)), and molecular hydrogen (H(2)) on Pd NPs, and then their 
      effect on EHDC of 2,4-dichlorophenol (2,4-DCP). Our results show that H*(ads), 
      H*(abs), and H(2) all emerge at -0.65 V (vs Ag/AgCl) and have increased amounts 
      at more negative potentials, except for H*(ads) that exhibits a reversed trend 
      with the potential varying from -0.85 to -0.95 V. Overall, the concentrations of 
      these three species evolve in an order of H*(abs) < H*(ads) < H(2) in the 
      potential range of -0.65 to -0.85 V, H*(ads) < H*(abs) < H(2) in -0.85 to -1.00 
      V, and H*(ads) < H(2) < H*(abs) in -1.00 to -1.10 V. By correlating the evolution 
      of each hydrogen species with 2,4-DCP EHDC kinetics and efficiency, we find that 
      H*(ads) is the active species, H*(abs) is inert, while H(2) bubbles are 
      detrimental to the EHDC reaction. Accordingly, for an efficient EHDC reaction, a 
      moderate potential is desired to yield sufficient H*(ads) and limit H(2) negative 
      effect. Our work presents a systematic investigation on the reaction mechanism of 
      EHDC on Pd catalysts, which should advance the application of EHDC technology in 
      practical environmental remediation.
FAU - Jiang, Guangming
AU  - Jiang G
AUID- ORCID: 0000-0002-7375-0107
AD  - Engineering Research Center for Waste Oil Recovery Technology and Equipment, 
      Ministry of Education, Chongqing Technology and Business University , Chongqing 
      400067, China.
FAU - Lan, Mengna
AU  - Lan M
AD  - Engineering Research Center for Waste Oil Recovery Technology and Equipment, 
      Ministry of Education, Chongqing Technology and Business University , Chongqing 
      400067, China.
FAU - Zhang, Zhiyong
AU  - Zhang Z
AD  - Department of Chemistry, University of Virginia , Charlottesville, Virginia 
      22904, United States.
FAU - Lv, Xiaoshu
AU  - Lv X
AD  - Engineering Research Center for Waste Oil Recovery Technology and Equipment, 
      Ministry of Education, Chongqing Technology and Business University , Chongqing 
      400067, China.
FAU - Lou, Zimo
AU  - Lou Z
AD  - Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, 
      China.
FAU - Xu, Xinhua
AU  - Xu X
AD  - Department of Environmental Engineering, Zhejiang University , Hangzhou 310058, 
      China.
FAU - Dong, Fan
AU  - Dong F
AD  - Engineering Research Center for Waste Oil Recovery Technology and Equipment, 
      Ministry of Education, Chongqing Technology and Business University , Chongqing 
      400067, China.
FAU - Zhang, Sen
AU  - Zhang S
AD  - Department of Chemistry, University of Virginia , Charlottesville, Virginia 
      22904, United States.
LA  - eng
PT  - Journal Article
DEP - 20170613
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Chlorophenols)
RN  - 059QF0KO0R (Water)
RN  - 5TWQ1V240M (Palladium)
RN  - 7YNJ3PO35Z (Hydrogen)
RN  - R669TG1950 (2,4-dichlorophenol)
SB  - IM
MH  - Catalysis
MH  - Chlorophenols/*chemistry
MH  - Hydrogen
MH  - Nanoparticles/*chemistry
MH  - Palladium
MH  - Water
EDAT- 2017/05/26 06:00
MHDA- 2018/01/13 06:00
CRDT- 2017/05/26 06:00
PHST- 2017/05/26 06:00 [pubmed]
PHST- 2018/01/13 06:00 [medline]
PHST- 2017/05/26 06:00 [entrez]
AID - 10.1021/acs.est.7b01128 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2017 Jul 5;51(13):7599-7605. doi: 10.1021/acs.est.7b01128. 
      Epub 2017 Jun 13.