Understanding the effect of Pd size on formic acid dehydrogenation via size-controlled Pd/C catalysts prepared by NaBH4 treatment

Kim, Yongwoo; Kim, Do Heui

doi:10.1016/j.apcatb.2018.12.008

Cited by 122 publications

(68 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Clearly, increasing the reaction temperature could result in the increase of hydrogen generation rate. The corresponding activation energies for FA dehydrogenation over Pd/PAN and Pd/EDA‐PAN are 38.0 and 40.5 kJ/mol, respectively, which are comparable with the most active supported Pd‐based catalysts ever reported 24–26 . A relatively high TOF value of 3989 h −1 could be obtained for Pd/EDA‐PAN catalyst at the reaction temperature of 333 K, higher than that of Pd/PAN (3099 h −1 ).…”

Section: Resultssupporting

confidence: 65%

The enhanced role of surface amination on the catalytic performance of polyacrylonitrile supported palladium nanoparticles in hydrogen generation from formic acid

Chen

Jia

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Hydrogen production by formic acid (FA) has attracted widespread attention in the field of catalysis and energy chemistry. Here, we develop a highly efficient catalyst for FA dehydrogenation by surface amination of polyacrylonitrile (PAN) supported palladium nanoparticles (Pd NPs). The support of PAN derived from a soap‐free emulsion polymerization was ammoniated by simply treating it with ethylenediamine (EDA) solution under heating. Compared with the parent PAN material, the aminated PAN (EDA‐PAN) is a more suitable support to achieve high dispersion of Pd NPs with ultra‐small particle size (around 1.2 nm), and to fabricate more active and stable supported Pd‐based catalyst for FA dehydrogenation. The turnover frequency (TOF) of the Pd/EDA‐PAN catalyst could reach to 3989 h−1 at 333 K without using any additional bases or additives. More significantly, the aminated catalyst could even work well at ambient temperature with a TOF of 688 h−1 at 303 K.

show abstract

Section: Resultssupporting

confidence: 65%

The enhanced role of surface amination on the catalytic performance of polyacrylonitrile supported palladium nanoparticles in hydrogen generation from formic acid

Chen

Jia

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…H 2 production from formic acid decomposition typically occurs via two pathways, the common path being dehydrogenation of formic acid which generates and carbon dioxide (CO 2 ) as a by-product. On the other hand, the dehydration of formic acid is another route which can produce water (H 2 O) and undesirable carbon monoxide (CO) [2]. The catalysts employed for the dehydrogenation of formic acid can be classified into two distinct categories which are homogeneous and heterogeneous ones.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of Additive-Free Formic Acid Using a Pd/C Catalyst in Flow: Experimental and CFD Modelling Studies

et al. 2021

View full text Add to dashboard Cite

The use of hydrogen as a renewable fuel has gained increasing attention in recent years due to its abundance and efficiency. The decomposition of formic acid for hydrogen production under mild conditions of 30 °C has been investigated using a 5 wt.% Pd/C catalyst and a fixed bed microreactor. Furthermore, a comprehensive heterogeneous computational fluid dynamic (CFD) model has been developed to validate the experimental data. The results showed a very good agreement between the CFD studies and experimental work. Catalyst reusability studies have shown that after 10 reactivation processes, the activity of the catalyst can be restored to offer the same level of activity as the fresh sample of the catalyst. The CFD model was able to simulate the catalyst deactivation based on the production of the poisoning species CO, and a sound validation was obtained with the experimental data. Further studies demonstrated that the conversion of formic acid enhances with increasing temperature and decreasing liquid flow rate. Moreover, the CFD model established that the reaction system was devoid of any internal and external mass transfer limitations. The model developed can be used to successfully predict the decomposition of formic acid in microreactors for potential fuel cell applications.

show abstract

“…The difference in the catalytic performance attained by a certain system is normally related to their features (i.e., size and electronic properties of the nanoparticles, porous texture of the catalysts, location of the nanoparticles, accessibility to reactant and interaction with the reaction products, etc.). It has been reported in other studies that the size of the nanoparticles has an important impact on the catalytic performance; however, different tendencies have been observed (Navlani-García et al, 2016b;Kim and Kim, 2019). In this case, better performances were observed for smaller nanoparticles (TOF of 229, 288, and 515 h −1 for nanoparticles of 3.3, 2.6, and 2.5 nm, respectively) for the as-synthesized catalysts.…”

Section: Catalytic Activitymentioning

confidence: 61%

MWCNT-Supported PVP-Capped Pd Nanoparticles as Efficient Catalysts for the Dehydrogenation of Formic Acid

et al. 2020

View full text Add to dashboard Cite

Various carbon materials were used as support of polyvinylpyrrolidone (PVP)-capped Pd nanoparticles for the synthesis of catalysts for the production of hydrogen from formic acid dehydrogenation reaction. Among investigated, MWCNT-supported catalysts were the most promising, with a TOF of 1430 h −1 at 80 • C. The presence of PVP was shown to play a positive role by increasing the hydrophilicity of the materials and enhancing the interface contact between the reactant molecules and the catalytic active sites.

show abstract

Understanding the effect of Pd size on formic acid dehydrogenation via size-controlled Pd/C catalysts prepared by NaBH4 treatment

Cited by 122 publications

References 61 publications

The enhanced role of surface amination on the catalytic performance of polyacrylonitrile supported palladium nanoparticles in hydrogen generation from formic acid

The enhanced role of surface amination on the catalytic performance of polyacrylonitrile supported palladium nanoparticles in hydrogen generation from formic acid

Decomposition of Additive-Free Formic Acid Using a Pd/C Catalyst in Flow: Experimental and CFD Modelling Studies

MWCNT-Supported PVP-Capped Pd Nanoparticles as Efficient Catalysts for the Dehydrogenation of Formic Acid

Contact Info

Product

Resources

About