Effects of Pt/C, Pd/C and PdPt/C anode catalysts on the performance and stability of air breathing direct formic acid fuel cells

Peng, Hong; Luo, Fan; Liao, Shijun; Zeng, Jianhuang

doi:10.1016/j.ijhydene.2011.04.081

Cited by 70 publications

(29 citation statements)

References 29 publications

(26 reference statements)

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“…In the anode side of DFAFC stacks, the bipolar plates have to face additional higher concentration of formic acid besides the inevitable corrosion environment of PEMFCs , . The formic acid contained in the DFAFC increases the electrochemical corrosion of bipolar plates, shortening their service life , , . The corrosion products on the surface would increase the interfacial contact resistance and poison the catalyst, thus decreasing the power output of the fuel cells .…”

Section: Introductionmentioning

confidence: 99%

“…However, bare stainless steels could not be efficaciously applied into PEMFCs in the aspect of corrosion resistance , . As previously mentioned, the bipolar plates, which are used in the DFAFC environments, are exposed to more aggressive acid environment than them in the PEMFC electrolyte , . Therefore, a stronger corrosion resistance layer must be synthesized on the surface of bare stainless steels to prolong their service life in DFAFC stacks.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Properties of Niobium Modified AISI316L Stainless Steel Bipolar Plates for Direct Formic Acid Fuel Cell

Cui

et al. 2017

Fuel Cells

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To ameliorate the corrosion resistance and surface electrical conductivity of AISI316L stainless steel (316L SS) as bipolar plates for direct formic acid fuel cell (DFAFC), a niobium diffusion layer has been successfully prepared on 316L SS substrate via the plasma surface diffusion alloying (PSDA) technique. The niobium modified AISI316L stainless steel (Nb‐316L SS) has a compact and successive niobium diffusion layer with a lower interfacial contact resistance (ICR) compared with bare 316L SS. The electrochemical behaviors of Nb‐316L SS in simulated varied anode (0.05M H2SO4 + 2 ppm HF + xM formic acid (x = 2, 5, 10 and 15) solution at 50 °C) and cathode (0.05M H2SO4 + 2 ppm HF solution at 50 °C, bubbled with air) DFAFC environments are systematically studied. The results show that the corrosion resistance of 316L SS is distinctly bettered in both anode and cathode environments of DFAFC after the PSDA modification. After 4 h potentiostatic polarization tests, the ICR of bare and Nb‐316L SS have increased at the clamping force of 140 N cm−2, but the increasing amplitude of the ICR for Nb‐316L SS is much smaller than that of bare 316L SS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of Niobium Modified AISI316L Stainless Steel Bipolar Plates for Direct Formic Acid Fuel Cell

Cui

et al. 2017

Fuel Cells

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“…Platinum (Pt), well known for its excellent catalytic activity for electrooxidation of methanol, exhibits less satisfactory performance for FA oxidation, the surface of Pt is easily poisoned by the strong adsorbed CO ads species produced during the oxidation of FA to have a further lowered catalytic performance [13–15]. Furthermore, the high cost and limited world supply also motivate extensive researches to the development of non-Pt catalysts [16,17].…”

Section: Introductionmentioning

confidence: 99%

Optimal Electrocatalytic Pd/MWNTs Nanocatalysts toward Formic Acid Oxidation

Wei

Guo

et al. 2015

Electrochimica Acta

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The operating conditions such as composition of electrolyte and temperature can greatly influence the formic acid (HCOOH) oxidation reaction (FAOR). Palladium decorated multi-walled carbon nanotubes (Pd/MWNTs) were successfully synthesized and employed as nanocatalysts to explore the effects of formic acid, sulfuric acid (H2SO4) concentration and temperature on FAOR. Both the hydrogen adsorption in low potential range and the oxidation of poisoning species during the high potential range in cyclic voltammetry were demonstrated to contribute to the enhanced electroactivity of Pd/MWNTs. The as-synthesized Pd/MWNTs gave the best performance under a condition with balanced adsorptions of HCOOH and H2SO4 molecules. The dominant dehydrogenation pathway on Pd/MWNTs can be largely depressed by the increased dehydration pathway, leading to an increased charge transfer resistance (Rct). Increasing HCOOH concentration could directly increase the dehydration process proportion and cause the production of COads species. H2SO4 as donor of H+ greatly facilitated the onset oxidation of HCOOH in the beginning process but it largely depressed the HCOOH oxidation with excess amount of H+. Enhanced ion mobility with increasing the temperature was mainly responsible for the increased current densities, improved tolerance stabilities and reduced Rct values, while dehydration process was also increased simultaneously.

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“…Ni is a very good option along with Pt metal, as it is not only cheap but also active for hydrogen iodide-decomposition reaction [20,21]. It has been confirmed that bimetallic catalysts have better activity and stability than monometallic catalysts in many other catalytic reactions also [46][47][48]. Wang et al [23] described that the stability of Pt based bimetallic catalysts was due to alloying of Pt and other transition metals like Pd, Rh, and Ni (Pt/M = 2, where M = Pd, Rh or Ni) at 500°C.…”

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confidence: 99%

Catalytic performance of bimetallic Ni-Pt nanoparticles supported on activated carbon, gamma-alumina, zirconia, and ceria for hydrogen production in sulfur-iodine thermochemical cycle

Singhania

Krishnan

Bhaskarwar

et al. 2016

International Journal of Hydrogen Energy

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Bimetallic Ni-Pt nanoparticles supported on four different supports (activated carbon (AC)) 1 , γ-alumina, zirconia, and ceria) were prepared by modified impregnation-reduction technique for decomposition of hydrogen iodide to hydrogen and iodine, in the thermochemical water-splitting sulfur-iodine (SI) cycle. The catalysts were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) method to find their structure, morphology, and surface area, respectively. High metal dispersions (Ni-Pt) were obtained with particle sizes of the order of 10 nm or lesser, in the high-surface-area supports. The hydrogen iodide-decomposition results showed the following catalytic activity order of Ni-Pt nanoparticles on different supports: Ni(2.5%)-Pt(2.5%)/AC > Ni(2.5%)-Pt(2.5%)/γ-alumina > Ni(2.5%)-Pt(2.5%)/Zirconia > Ni(2.5%)-Pt(2.5%)/Ceria. Bimetallic Ni(2.5%)-Pt(2.5%)/AC also showed excellent stability for 100 h in the hydrogen iodide-decomposition reaction, and with a higher performance relative to the corresponding Pt supported catalyst under the same operating conditions.

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Effects of Pt/C, Pd/C and PdPt/C anode catalysts on the performance and stability of air breathing direct formic acid fuel cells

Cited by 70 publications

References 29 publications

Electrochemical Properties of Niobium Modified AISI316L Stainless Steel Bipolar Plates for Direct Formic Acid Fuel Cell

Electrochemical Properties of Niobium Modified AISI316L Stainless Steel Bipolar Plates for Direct Formic Acid Fuel Cell

Optimal Electrocatalytic Pd/MWNTs Nanocatalysts toward Formic Acid Oxidation

Catalytic performance of bimetallic Ni-Pt nanoparticles supported on activated carbon, gamma-alumina, zirconia, and ceria for hydrogen production in sulfur-iodine thermochemical cycle

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