Effects of various factors on the hydrogen isotope separation efficiency of a novel hydrophobic platinum-polytetrafluoroethylene catalyst

Platinum Nanoparticles Anchored on Covalent Triazine Frameworks Modified Cordierite for Efficient Oxidation of Hydrogen Isotopes

“…The metal–support interaction effect indicates that the structure of the support can significantly affect the activity of the catalyst . Based on this effect, hydrophobic substrates have been designed for Pt loading to reduce the deactivation induced by water. , Huang et al designed a hydrophobic Pt/PTFE catalyst for water–hydrogen isotope exchange . Due to the hydrophobic polytetrafluoroethylene supports, Pt/PTFE showed a stable liquid phase catalytic exchange in water.…”

“…Due to the high irradiation and scarcity of tritium, hydrogen (H 2 ) and deuterium (D 2 ) were used to replace tritium in catalytic experiments. The catalytic activity can be affected by various environmental factors, including temperature, space velocity, and the original concentration of H 2 /D 2 ; , thus, the influences of temperature, original concentration, and space velocity of H 2 /D 2 on catalytic ability were studied systematically. The restart performance of the CTF-based catalyst (named “HisoNCat” in the following) was examined through continuous operation and intermittent start-stop processes, and the isotope effect was also assessed.…”

“…23,24 Huang et al designed a hydrophobic Pt/ PTFE catalyst for water−hydrogen isotope exchange. 25 Due to the hydrophobic polytetrafluoroethylene supports, Pt/PTFE showed a stable liquid phase catalytic exchange in water. In our previous works, a porous and hydrophobic Pt catalyst based on conjugated microporous polymers (HisoCat) was constructed.…”

Liquid-Phase Catalytic Exchange of Hydrogen Isotopes over Platinum on Dual-Modified Graphene

“…Upgrading of recycled water from a nuclear power station usually contains low abundances of deuterium (D) and radioactive tritium (T), which are needed to separate these hydrogen isotopes and decrease their toxicity. − In general, separation technologies include physical processes such as distillation and thermal diffusion and chemical reactions like catalytic exchange. As one of the catalytic exchange technologies, liquid-phase catalytic exchange (LPCE) has attracted much attention because of mild operating conditions, low energy consumption, and high separation efficiency. − …”

“…Meanwhile, because platinum as an active site is easily covered by water to deactivate its activity, platinum nanoparticles need to be loaded on the hydrophobic support to maintain their long-term activity. For instance, platinum nanoparticles were dispersed on hydrophobic styrene divinylbenzene copolymer (Pt/SDB) − and poly­(tetrafluoroethylene) (Pt/PTFE) , first. Furthermore, to improve the efficiency of catalytic exchange, electric conductive supports, such as active carbon, , carbon nanotubes, and MIL-101, were introduced into the hydrophobic supports.…”