This paper focuses on a new polyaniline-derived non-precious cathode catalyst with high oxygen-reduction activity, verified in electrochemical and fuel cell testing. The rotating disk (RDE) onset and half-wave potential (E1⁄2) of oxygen reduction were measured at 0.90 V and 0.77 V, respectively. Rotating ring-disk electrode (RRDE) study revealed very good selectivity in the fourelectron reducti...

Phosphinito-imines, a new class of P,N donors, are readily generated by reaction of bulky arylamide anions [RCONAr] (R = Me or t-Bu; Ar = 2,6-i-Pr2C6H4) with chlorophosphines ClP(R)2. In solution, free phosphinito-imines exist in equilibrium with the corresponding amidophosphine tautomers, containing a nitrogen-bound P(R)2 group. However, reacting the tautomer mixtures with metal precursor comp...

Platinum group elements (PGEs) are widely-used electrocatalysts. However, the low abundance of PGEs in earth's crust and high environmental impacts to be acquired result costs, limiting their use drinking water treatment. Identifying sustainable alternatives is a major barrier applying electrocatalysis for nitrate reduction. By moving up periodic table, this study provides framework selecting p...

Lowering or eliminating the noble-metal content in oxygen reduction fuel cell catalysts could propel large-scale introduction of commercial systems. Several free are already under investigation with metal-nitrogen-carbon (Me-N-C) system being one most promising. In this study, a systematic approach to investigate influence metal ratios bimetallic Me-N-C cells reaction (ORR) has been taken. Diff...

Abstract The electrocatalytic nitrogen reduction reaction (NRR) has been one of the most intriguing catalytic reactions in recent years, providing an energy-saving and environmentally friendly alternative to conventional Haber–Bosch process for ammonia production. However, activity selectivity issues originating from activation barrier NRR intermediates competing hydrogen evolution result unsat...

Asymmetric oxidation of heterocyclic sulfides, including imidazole, benzimidazole, indole and pyrimidine derivatives, were studied using a tartrate/Ti((i)OPr)4 catalyst system.

Nitrogen mustard alkylating agents react with isolated DNA in a sequence selective manner, and the substituent attached to the drug reactive group can impose a distinct sequence preference. It is not clear however to what extent the observed DNA sequence preferences are preserved in intact cells. The highly reiterated sequence of human alpha DNA has been used to determine the sites of guanine-N...

Metal-free catalysts, such as graphene/carbon nanostructures, are highly cost-effective to replace expensive noble metals for CO2 reduction if fundamental issues, such as active sites and selectivity, are clearly understood. Using both density functional theory (DFT) and ab initio molecular dynamic calculations, we show that the interplay of N-doping and curvature can effectively tune the activ...

Introduction Nitrogen oxides (NOx) cause the photochemical smog, acid rain, ozone depletion and greenhouse effect. Therefore, a great deal of studies has been performed to reduce NOx by using various catalytic systems such as selective catalytic reduction (SCR) or NOx storagereduction catalyst. Recently, N2O, whose greenhouse effect is 310 times larger than CO2, has been issued due to the new r...