Prikazujući povijest obitelji Čop iz sela Plešce autor progovara o turističkoj ponudi Gorskoga kotara u razdoblju od sredine 19. stoljeća do današnjih dana. Kuća Čopovih, u narodu zvana "Palčava ...šiša", bila je tijekom spomenutog razdoblja istovremeno obiteljska kuća, gostionica, trgovina i sjedište društvenog života tog područja. S obzirom da su stjecanjem povoljnih povijesnih okolnosti sačuvani izvorna gradnja iz sredine i druge polovice 19. st. te dijelovi unutarnje dekoracije, pokućstvo, peći, bogata knjižnica i opširna zbirka dokumenata, predloženo je da se "Palčava šiša" proglasi kulturnim spomenikom.
Tko je bila žena koja je krajem osamdesetih godina pretprošlog stoljeća bila članicom čak triju međunarodnih etnografskih društava? Mara Čop, hrvatska književnica njemačkog jezika koja je većinu ...svojih književnih, književno-znanstvenih i publicističkih djela potpisivala "Mara Čop Marlet" i "Marie von Berks", po ocu je Hrvatica - otac joj je izdanak poznate trgovačke obitelji Čop iz Karlovca, a po majci Njemica - djed s majčine strane prezivao se Eiberger, dok je baki djevojačko prezime bilo Magnino.
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•A novel CoP/CeO2 heterostructure is developed by the selective phosphidation of Co(OH)3/CeO2 precursor.•CoP/CeO2 heterostructure possesses abundant interface active sites and oxygen ...vacancies.•CoP/CeO2 heterostructure exhibits outstanding performance towards oxygen evolution reaction.•A Zn-air battery with CoP/CeO2 + Pt/C as air-cathode shows impressive long-life cycling stability.
Exploring cost-effective and high-efficiency electrocatalyst for the oxygen evolution reaction (OER) is critical for renewable energy conversion and storage. Herein, we report a novel and high-efficiency OER catalyst by simply interface engineering of CoP nanosheets and CeO2 nanoparticles. Such interface-regulated strategy triggers the generation of abundant oxygen vacancies and more catalytically active sites on the surface of CoP/CeO2 heterostructure; while regulates the electronic structure of CoP and CeO2 resulting in fast charge-transfer capacity. For the OER, the CoP/CeO2 heterostructure exhibits an extremely low overpotential of about 224 mV at 10 mA cm−2, which is superior to that of CoP (380 mV), CeO2 (628 mV) and RuO2 (355 mV) counterparts. Furthermore, a high-power rechargeable Zn-air battery with impressive long-life cycling stability (over 500 cycles) is demonstrated based on CoP/CeO2 + Pt/C as the air–cathode. The present findings not only place CoP/CeO2 heterostructure as an outstanding electrocatalyst for the OER, but also offer a promising interface-regulated strategy for the development of high-performance electrocatalyts.
In this work, we design and fabricate a novel Zn0·5Cd0·5S/CoP composite with a 3D microflower structure by a facile hydrothermal method. Comprehensive photochemical measurements showed that the ...engineering of highly conductive CoP co-catalyst into Zn0·5Cd0·5S solid solution improves the visible light response capability by narrowing the forbidden band gap. At the same time, a morphology control by forming a 3D microflower structure could realize an intimate contact interface between Zn0·5Cd0·5S and CoP, which ensures that electrons from Zn0·5Cd0·5S excited by visible light (420 nm) can be effectively transferred to the highly conductive CoP for separation and migration. The systematic photocatalytic hydrogen evolution experiments illustrate a remarkable hydrogen production rate up to 72.71 mmol h−1 g−1 for Zn0·5Cd0·5S/CoP with a CoP mass fraction of 20 wt%, which is 27 times higher than that of bare Zn0·5Cd0.5S. Based on the characterization analysis results, a possible mechanism of hydrogen production by Zn0·5Cd0·5S/CoP composite catalyst is proposed.
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•A novel hierarchical Zn0·5Cd0·5S/CoP heterojunction is first synthesized.•CoP co-catalyst was prepared by carbonization and phosphorization of ZIF-67.•Zn0·5Cd0·5S/CoP heterojunction exhibits excellent photocatalytic performance.•The synergy in heterojunction can accelerate the separation of electron-hole pairs.
•A novel three-phase heterojunction Fe2P–CoP/CeO2 was successfully constructed.•The interfacial charge density could be modulated by CeO2 nanoparticles.•The Fe2P–CoP/CeO2 heterostructure catalyst ...exhibits remarkable activities towards HER,OER, and overall water splitting.•The enhancement of the electrocatalytic performance was investigated by DFT calculations.
Modulating the electronic structure of an electrocatalyst via interface engineering is a promising strategy to accelerate the overall electrocatalytic water splitting. In this work, a novel three-phase heterojunction Fe2P–CoP/CeO2 is constructed via interface engineering combined with a selective phosphorization process. Coupling CeO2 at the interface of Fe2P and CoP effectively promotes the redistribution of electrons at the three-phase interface, which optimizes the Gibbs free energy of H* adsorption energy and significantly reduces the water dissociation energies, thus boosting the electrocatalytic water splitting in alkaline media. As a result, the Fe2P–CoP/CeO2-20 exhibits excellent performances toward HER (η10=45 mV, η50= 100 mV) and OER (η10=248 mV, η50= 278 mV). Moreover, an overall water splitting electrolyzer constructed by Fe2P–CoP/CeO2-20 only requires a cell voltage of 1.52 V to deliver a current density of 10 mA cm−2. Interestingly, the assembled electrolyzer can also be driven by a solar panel for overall water splitting. This work offers a feasible strategy for regulating the electronic structure of three-phase heterojunction interface to promote electrochemical water splitting.
